Cub Cadet Trimmer ST23 User Manual
ST23  
ST26  
ST35  
Trimmers  
Operator's Manual  
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SAFETY PRECAUTIONS  
GENERAL:  
regular users should monitor closely the  
condition of their hands and fingers. If any of the  
above symptoms appear, seek medical advice  
immediately.  
1. It is important that you read, fully understand and  
observe the following safety precautions and  
warnings. Read the Operator's Manual and the  
safety instructions periodically.  
PROTECTIVE CLOTHING: Trimmer operation can  
cause serious injury to eyes, ears and body. The  
deflector provided with your trimmer may not  
protect the operator from all foreign objects (gravel,  
glass, wire, etc.) thrown by the rotating cutting line  
or blade. Thrown objects may also ricochet and  
strike the operator.  
2. Do not lend or rent out your trimmer without the  
Operator’s Manual. Be sure that anyone using  
your trimmer understands the information  
contained in this Operator’s Manual.  
3. Careless or improper use of this trimmer may  
cause serious or even fatal injury.  
1. Clothing must be sturdy and snug-fitting, but  
allow complete freedom of movement. Avoid  
loose-fitting jackets, scarfs, neckties, jewelry,  
flared or cuffed pants, unconfined long hair or  
anything that could become caught on branches,  
brush or moving parts of the unit. Wear long  
pants made of heavy material to protect your  
legs. DO NOT WEAR SHORTS.  
4. The use of the trimmer can be hazardous. If the  
rotating cutting line or a blade comes in contact  
with your body, it will cut you. When it comes in  
contact with solid foreign objects such as rocks  
or bits of metal, it may fling them directly or by  
ricochet in the direction of bystanders or the  
operator.  
2. To reduce the risk of injury to your eyes, never  
operate the trimmer unless wearing goggles or  
properly fitted safety glasses with adequate top  
and side protection complying with ANSI Z 87.1.  
5. Cub Cadet Commercial does not recommend the  
use of rigid blades when cutting in stony areas.  
Thrown objects or damaged blades may result in  
serious or fatal injury to the operator or bystand-  
ers.  
3. To reduce the risk of injury to your face Cub  
Cadet Commercial recommends that you also  
wear a face shield or face screen over your  
goggles or safety glasses.  
PHYSICAL CONDITION: You must be in good  
physical condition and mental health and not under  
the influence of any substance (drugs, alcohol, etc.)  
which might impair vision, dexterity or judgment. Do  
not operate the trimmer when you are fatigued.  
4. Trimmer noise may damage your hearing. Wear  
sound barriers (ear plugs or ear mufflers) protect  
your hearing. Continual and regular user should  
have their hearing checked regularly.  
1. Be alert - if you get tired while operating your  
trimmer, take a break. Fatigue may result in loss  
of control. Working with the trimmer can be  
strenuous. If you have any condition that might  
be aggravated by strenuous work, check with  
your doctor before operating the trimmer.  
5. Protect your hands with gloves when handling  
the trimmer. Heavy-duty, nonslip gloves improve  
your grip and protect your hands.  
6. Good footing is most important in trimmer work.  
Wear sturdy boots with nonslip soles. Steel-toed  
safety boots are recommended.  
2. Prolonged use of the trimmer (or other ma-  
chines) exposing the operator to vibrations may  
produce whitefinger disease (Raynaud's  
phenomenon) or carpal tunnel syndrome. These  
conditions reduce the hand's ability to feel and  
regulate temperature, produce numbness and  
burning sensations and may cause nerve and  
circulation damage and tissue necrosis.  
7. Wear an approved safety hard hat to reduce the  
risk of injury to your head.  
PROTECTING OTHERS:  
Antivibration systems do not guarantee that you  
will not sustain whitefinger disease or carpal  
tunnel syndrome. Therefore, continual and  
1. Minors should never be allowed to use the  
trimmer.  
2
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SAFETY PRECAUTIONS  
fuel.  
2. Spectators, children, fellow workers and animals  
must be warned to stay back 50 feet (15m) while  
the trimmer is in use. Stop the engine and cutting 3. Fuel your trimmer outdoors or in a well-ventilated  
head immediately if you are approached.  
area.  
3. People working in the area near you should wear  
the same protective equipment as the operator.  
4. Select bare ground for fueling and move at least  
10 feet (3 m) from the fueling spot before starting  
the engine.  
PREPARATION FOR THE USE OF THE  
TRIMMER:  
5. Gasoline vapor pressure may build up inside the  
gas tank of a two cycle engine depending on the  
fuel used, the weather conditions, and the  
venting system of the tank. In order to reduce the  
risk of personal injury from escaping gas vapor  
and fumes, remove the fuel filler cap on your  
trimmer carefully so as to allow any pressure  
buildup in the tank to release slowly.  
1. Never modify the trimmer in any way. Only  
attachments supplied by Cub Cadet Commercial  
or expressly approved by Cub Cadet Commer-  
cial for use with the specific Cub Cadet Commer-  
cial trimmer models are authorized. Although  
certain unauthorized attachments are usable  
with the Cub Cadet Commercial trimmer, their  
use may, in fact, be extremely dangerous.  
6. Never remove the fuel filler cap while the engine  
is running.  
2. When transporting your trimmer in a vehicle,  
properly secure it to prevent turnover, fuel  
spillage and damage to the trimmer.  
7. Unit vibrations can cause an improperly  
tightened fuel cap to loosen or come off  
permitting fuel to spill. In order to reduce the risk  
of fuel spillage and fire, tighten the fuel cap by  
hand with as much force as possible.  
3. Always use the shoulder harness when using  
rigid blades.  
4. Adjust the shoulder harness and hand grips to  
suit your size before starting work.  
8. Wipe off any spilled fuel before starting your  
trimmer.  
5. Always check your trimmer for proper condition  
and operation before starting, particularly the  
throttle trigger, throttle trigger interlock, stop  
switch, cutting head or blade, deflector and  
harness.  
9. Check for fuel leakage while refueling and during  
operation. If fuel or oil leakage is found, do not  
start or run the engine until the leak is fixed and  
spilled fuel has been wiped away.  
10. If fuel spills on your clothing, change your  
clothing immediately.  
6. The throttle trigger must move freely and always  
spring back to the idle position. The cutting head  
must be properly tightened and in safe operating  
condition. Inspect for loose parts (nuts, screws,  
etc.).  
CARBON MONOXIDE HAZARDS:  
1. If you operate the trimmer in an area that is  
confined, or even partially enclosed, the air you  
breathe could contain a dangerous amount of  
exhaust gas. To keep exhaust gas from building  
up, provide adequate ventilation.  
HANDLING FUEL: The Cub Cadet Commercial  
trimmer uses an oil-gasoline  
mixture for fuel.  
1. Gasoline is an extremely flammable fuel. If  
spilled and ignited by a spark or other ignition  
source, it can cause fire, serious burn injury and  
property damage. Use extreme caution when  
handling gasoline or an oil-gasoline fuel mixture.  
2. The exhaust gas contains carbon monoxide, a  
poisonous, colorless and odorless gas. Breath-  
ing the exhaust gas can cause loss of conscious-  
ness and may lead to death.  
2. Do not smoke or bring any fire or flame near the  
3
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SAFETY PRECAUTIONS  
STARTING: Your trimmer is a one-person machine.  
8. Before trimming, inspect the area for stones,  
glass, pieces of metal, trash or other solid  
objects. The cutting line could throw objects of  
this kind.  
1. Start and operate your trimmer without assis-  
tance. When starting, place the trimmer on firm  
ground or a solid surface in an open area.  
Maintain good balance and secure footing.  
9. This trimmer is to be used normally at ground  
level with the cutting head or blade parallel to the  
ground. Using the trimmer above ground level or  
with the cutting head or blade perpendicular to  
the ground may increase the risk of injury, since  
the cutting line or blade is more fully exposed  
and the trimmer may be more difficult to control.  
Never use your trimmer as a hedge trimmer.  
2. To reduce the risk of injury from loss of control,  
be absolutely sure that the cutting head or blade  
is clear of you and all other obstructions and  
objects, including the ground when starting,  
because when the engine starts, the engine  
speed will be fast enough for the clutch to  
engage and turn the cutting head or blade.  
10. When using rigid blades, avoid cutting close to  
fences, sides of buildings, tree trunks, stones or  
other such objects that could cause the trimmer  
to kick out or could cause damage to the blade.  
Cub Cadet Commercial recommends use of the  
nylon line heads or Polycut head for such jobs.  
In addition, be alert to an increased possibility  
of ricochets in such situations.  
3. When you pull the starter grip, do not wrap the  
starter rope around your hand. Do not allow the  
grip to snap back, but guide the starter rope to  
rewind properly. Failure to follow this procedure  
may result in injury to your hand or fingers and  
may damage the starter mechanism.  
OPERATION:  
11. Do not use the starting throttle lock when you  
are trimming as you do not have control of the  
engine speed. For the proper use of the throttle  
lock, see “Starting” in the Operation Section.  
1. Work carefully.  
2. To reduce the risk of injury from thrown objects  
or blade contact, never operate the trimmer  
without a properly mounted deflector.  
12. If the cutting tool or deflector becomes clogged  
or stuck, always turn off the engine and make  
sure the cutting tool has stopped, before  
cleaning. Grass,weeds, etc. should be cleaned  
off the cutting tool at regular intervals.  
3. Operate the trimmer under good visibility and  
daylight conditions only.  
4. Always hold the trimmer firmly with both hands.  
Wrap your fingers tightly around the handles,  
keeping the handles cradled between your  
thumb and forefinger. Keep your hands in this  
position, to have your trimmer under control at all  
times.  
13. During cutting, check the tightness and the  
condition of the cutting tool at regular intervals.  
If the behavior of the tool changes, stop the  
engine immediately, and check the bolt  
securing the tool for tightness and the cutting  
tool for cracks and damage.  
5. Make sure your trimmer handles and grips are in  
good condition and free of moisture, pitch, oil or  
grease.  
14. Replace cracked, bent, warped, damaged or  
dull cutting blades immediately. Such tools may  
shatter at high speed and cause serious or fatal  
injury.  
6. Never attempt to operate the trimmer with one  
hand. You might lose control of the trimmer  
resulting in serious or fatal injury.  
15. A loose blade may cause the blade to crack,  
vibrate, break or come off the trimmer, which  
may result in serious or fatal injury. Make sure  
that the blade is properly tightened. Use the  
wrench supplied or one of sufficient length to  
obtain the proper torque. If the blade loosens  
after being properly tightened, stop work  
7. To reduce the risk of bodily injury resulting from  
loss of control and contact with the cutting head,  
always attach and wear the shoulder harness on  
those trimmers equipped with a straight shaft  
and loop handle.  
4
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SAFETY PRECAUTIONS  
immediately. The retaining bolt may be worn or  
damaged and should be replaced. Never use  
unauthorized parts to secure the blade. If the  
blade continues to loosen, see your Cub Cadet  
Commercial dealer. Never use a trimmer with a  
loose blade.  
16. To reduce the risk of personal injury from loss of  
control, do not use an incorrect idle adjustment.  
At correct idle speed, the head and line or  
blade should not move. For instructions on  
adjusting the idle speed, see “Carburetor  
Adjustment” in the Maintenance Section.  
17. Never touch a rotating cutting tool with your  
hand or any part of your body. It continues to  
rotate for a short period after the throttle trigger  
is released.  
18. Always turn off the engine and make sure the  
cutting line has stopped before putting the  
trimmer down.  
5
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METAL BLADE USE  
WARNING  
Specified deflector shield, bicycle handle and shoulder harness MUST be used on brushcutter with  
metal blades. Operating the brushcutter without specified deflector, shield, bicycle handle, and  
shoulder harness can cause serious personal injury.  
WARNING  
If blade is mounted improperly, it may come loose during operation and cause serious or fatal injury.  
REQUIRED PARTS………………Parts List on 3,4 page  
A. Blades; 23,26cc; 1.IM-195833140 2.IM-195833170 3.IM-195833230  
35cc; 1.IM-195833150 2.IM-195833070 3.IM-195833160  
B. Deflector; 4.IM-720463430  
C. Handle; 5.590541  
Blades  
Metal Shield  
(Deflector)  
2
1
D. Shoulder Harness; 6.IM-720853461  
4
C
3
Bicycle Handle  
5
Shoulder Harness  
6
D
B
A
WARNING  
Always wear hearing, eye, foot and leg protection when operating trimmer.  
WARNING  
Blade coasts after throttle release, maintain control and stop blade by contact with cut materials  
before the unit is set down.  
WARNING  
Read Operator’s manual. Follow ALL warning and safety instructions. Failure to do so can result  
in serious personal injury to the operator and / or bystanders.  
6
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DECAL INFORMATION  
WARNING  
LOCATE THE SAFETY DECALS ON YOUR TRIMMER. MAKE  
SURE THE DECALS ARE LEGIBLE AND THAT YOU UNDER-  
STAND AND FOLLOW THE INSTRUCTIONS ON THEM.  
DEFLECTOR DECAL:  
SHAFT DECALS: (Continued)  
Beware of KICKOUT (blade thrust)  
when using blades. Special  
precautions are necessary for blade  
operation, see your Operator's  
Manual. Install ONLY Cub Cadet  
Commercial approved blades on ST  
model trimmers equipped with  
proper blade shield, loop handle,  
shoulder harness, blade collar, nut  
and cotter pin.  
KICKOUT  
The blade/cutting attachment does  
not stop immediately after releasing  
the throttle. Keep hands and feet  
clear of the blade/cutting attachment  
unless the engine is shut off and the  
cutting attachment is not moving.  
SHAFT DECALS:  
This trimmer can be can be  
dangerous and cause serious injury  
if improperly used. To reduce injury  
risk to operator, helpers and  
bystanders, read and understand the  
Operator's Manual.  
INSPECT BLADES BEFORE USE.  
Blindness can occur from objects  
that are thrown or ricochet even with  
a shield in place. Operators, helpers  
and by-standers must wear ANSI  
Z87.1 approved eye protection.  
DO NOT USE DAMAGED, CRACKED, BENT,  
DULL, OR IMPROPERLY SHARPENED BLADES.  
Do not remove shields or decals, modify the unit or  
install unapproved attachments or parts. Approved  
attachments and replacement Operator's Manuals  
are available from your Cub Cadet Commercial  
dealer or by writing:  
Always wear hearing protection  
when operating a trimmer.  
CUB CADET CORPORATION  
P.O.Box 368023, Cleveland,OH 44136-9723  
Prevent accidental contact  
with the trimmer and any  
cutting attachment. Maintain a  
50 ft. (15m) radius, DANGER  
ZONE surrounding the  
operator. ONLY the operator,  
dressed in proper protective  
clothing should be in the  
DANGER ZONE.  
7
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SPECIFICATIONS  
Model  
ST23  
ST26  
ST35  
Loop Handle  
Loop Handle  
Loop Handle  
Length  
Width  
(mm)  
(in.)  
1783  
70.1  
260  
1783  
70.1  
260  
10.2  
264  
10.4  
5.1  
1818  
71.5  
260  
(mm)  
(in.)  
10.2  
250  
10.2  
277  
Height  
Weight  
(mm)  
(in.)  
9.84  
4.8  
10.9  
6.7  
(kg)  
(lb.)  
10.5  
11.2  
14.7  
Type of Engine  
Bore  
Air-cooled, two-stroke, single cylinder gasoline engine.  
(mm)  
(in.)  
33  
1.3  
33  
1.3  
37  
1.46  
Stroke  
(mm)  
(in.)  
26  
30  
32  
1.02  
1.18  
1.26  
Displacement  
(cc)  
22.2  
25.6  
34.4  
(cu. in.)  
(ps/rpm)  
1.35  
1.56  
2.1  
Engine Power  
Carburetor  
1.02/8000  
1.22/7500  
1.63/7500  
All position diaphragm carburetor with priming pump.  
Spark arrester muffler.  
Exhaust System  
Ignition System  
Spark Plug  
Flywheel magneto. (Electronic)  
NGK BPMR7A  
Fuel  
Mixed (gasoline and oil).  
Fuel/Oil Ratio  
50:1 Using Cub Cadet Commercial 2-Stroke Engine Oil.  
25-30:1 Using Other Brands of TC Oil.  
Fuel Tank Capacity (lit)  
(U.S. fl. oz.)  
0.45  
15.2  
0.55  
18.6  
0.65  
22.0  
8
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PARTS DESCRIPTION  
•
Blade/Cutting attachment does not stop immediately  
after releasing throttle. Keep hands and feet clear of  
blade/cutting attachment unless engine is shut off  
and cutting attachment is not moving.  
•
•
Prevent accidental contact with unit and any cuting  
attachment. Maintain 50 ft. (15 m) radius, DAN-  
GER ZONE surrounding the operator. ONLY the  
operator, dressed in proper protective clothing  
should be in the DANGER ZONE.  
WARNING  
a
•
•
This unit can be dangerous and cause serious  
injury if improperly used. To reduce injury risk to  
operator, helpers and bystanders, read and  
understand the Operator and Safety Manual.  
•
•
INSPECT BLADES BEFORE USE.  
DO NOT USE DAMAGED, CRACKED, BENT, DULL  
OR IMPROPERLY SHARPENED BLADES.  
Do not remove shields modify the unit or install  
attachments or parts not approved by manufacturer.  
Approved attachment information and replacement  
Operator and Safety Manual are available from man-  
ufacturer.  
Beware of KICKOUT【blade thrust】when using  
blades. Special precautions are necessary for  
blade operation, see your Operator and Safety  
Manual. ONLY install manufacturer approved  
blades on Brushcutter models equipped with prop-  
er blade shields, harness, blade collar, nut and cot-  
ter pin.  
Blindness can occur from objedts that are thrown  
or ricochet even with shield in place. Operators,  
helpers and bystanders must wear eye protec-  
tion, ANSI Z87.1 approved.  
•
kickout  
•
•
Always wear hearing protection when operating  
unit.  
Use caution when refueling hot engine. Never  
refuel while engine is on.  
7
12  
2
5
10  
3
4
11  
1
6
9
8
REF NO.  
DESCRIPTION  
REF NO.  
DESCRIPTION  
1
2
3
4
5
6
Gear Case  
Grip  
Throttle Wire  
Throttle Lever  
Hanger  
7
8
9
10  
11  
12  
Engine  
Head/Blade  
Deflector  
Stop Switch  
Drive Tube  
Loop Handle  
Shoulder Band (Standard on ST35)  
9
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TRIMMER ASSEMBLY  
The trimmer is partly disassembled for ease of  
shipment and must be assembled before it can be  
used for the first time.  
6. Line up the loop handle and tighten the screws  
firmly.  
B. MOUNTING THE DEFLECTOR:  
WARNING  
1. To mount the deflector, lay the trimmer on its  
back with the cutting tool head facing upward.  
Because of the increased risk of accidents  
the powerhead must not be started while it  
is detached from the trimmer.  
2
A. MOUNTING THE LOOP HANDLE:  
1
1
( )  
A
( )  
B
2. Place the deflector (Ref. 1) inside pointing  
upward, on the bracket already fitted to the drive  
shaft. Fit the plate (Ref. 2) on the inside of the  
deflector and line it up. Insert the four screws  
and tighten them down.  
1. Mount the loop handle (Ref. 1) .  
1
5
3. When using the nylon line trimmer, attach the  
deflector (B) with a chopper blade on your  
brushcutter in order to keep the line at the proper  
length. Failure to follow this procedure may  
damage your brushcutter.  
2
3
WARNING  
To reduce the risk of injury from thrown objects  
or blade contact, never operate the trimmer  
without a properly mounted deflector.  
4
2. Position the clamp (Ref. 2) in the loop handle  
(Ref. 1).  
C. MOUNTING THE CUTTING TOOL:  
3. Place both parts on the drive tube (Ref. 5).  
4. Position the clamp (Ref. 3).  
1. Install the nylon line trimmer head or the cutting  
blade as illustrated.  
5. Insert the screws (Ref. 4) hand tight.  
10  
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TRIMMER ASSEMBLY  
D. USING THE SHOULDER HARNESS (Standard  
on ST35):  
WARNING  
If the nylon line trimmer head or the blade is  
fitted improperly, it may come loose during  
operation and cause serious or fatal injury.  
1
Installing the Nylon Line Trimmer Head  
4
1. Put on the shoulder strap (Ref. 1).  
WARNING  
Always use the shoulder harness  
when using rigid blades.  
2
3
Installing steel blade  
7
6
5
4
3
1
2
WARNING  
Protect your hands with gloves if  
mounting a rigid blade.  
1
2. Align the hole in the holder (Ref. 3) with the hole  
in the gear case (Ref. 2) and install the locking  
tool (Ref. 1).  
1. Install the selected cutting blade as illustrated.  
2. Align the hole in the holder (Ref.2) with the hole  
in the gearcase and install the locking tool  
(Ref.1).  
3. Fit the nylon line trimmer head (Ref. 4) onto the  
shaft (turning it counterclockwise) until it is tight.  
3. Install cover (Ref.3).  
4. Install cutting blade (Ref.4).  
5. Install holder (Ref.5).  
4. Remove the locking tool.  
11  
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FUELING INSTRUCTIONS  
6. Install the bolt cover (Ref.6).  
2. Add the proper amount of two-stroke oil and mix  
thoroughly.  
7. Install the left hand nut (Ref.7) tighten to 18.5  
•
(N m).  
3. Add the remainder of the gasoline and mix  
thoroughly.  
WARNING  
Take care when handling gasoline. Avoid direct  
contact with the skin and avoid inhaling fuel vapor.  
Reread the Safety Precautions relating  
to “Handling Fuel” on Page 3.  
The gasoline container should be kept tightly  
closed in order to prevent any moisture getting into  
the mixture.  
The Cub Cadet Commercial trimmer uses an oil-  
gasoline mixture as fuel. The engine is certified to  
operate on unleaded gasoline.  
Only mix sufficient fuel for a few days work, not to  
exceed 30 days of storage. Store in a safety  
approved fuel container only.  
Use regular name-brand unleaded gasoline with a  
minimum octane number of 89. If the octane  
number of the regular grade gasoline in your area  
is lower use premium unleaded fuel. Fuel with a  
lower octane number may result in preignition  
(causing “pinging”) which is accompanied by an  
increase in engine temperature. This, in turn,  
increases the risk of piston seizure and damage to  
the engine.  
Fuel Mixes:  
Gasoline  
Oil (50:1)  
(Cub Cadet  
2-Stroke  
Oil (25-30:1)  
(Other Name-  
Brand TC Oils)  
Engine Oil)  
Liters  
Liters  
Liters  
(U.S. gal.)  
(U.S. fl. oz.)  
(U.S. fl. oz.)  
The chemical composition of the fuel is also  
important. Some fuel additives not only  
detrimentally affect elastomers (carburetor  
diaphragms, oil seals, fuel lines etc.), but  
magnesium castings as well. This could cause  
running problems or even damage the engine. For  
this reason it is essential that you use only name-  
brand fuels!  
1
(1)  
0.02  
(2.6)  
0.04-0.033  
(5.12-4.27)  
10  
(2.5)  
0.2  
(6.4)  
0.4-0.33  
(12.8-10.66)  
20  
(5)  
0.4  
(12.8)  
0.8-0.67  
(25.6-21.33)  
IMPORTANT:  
Do not use any gasoline containing alcohol.  
Serious engine or fuel system damage will occur.  
Dispose of empty two-stroke oil containers at  
authorized disposal locations only.  
Use only quality two-stroke, air-cooled engine oil  
with the classification TC. The mix ratio is 25-30:1.  
CAUTION  
We recommend Cub Cadet Commercial brand 2-  
Stroke Engine Oil since it is specially tested for use  
in all Cub Cadet Commercial two-stroke engines.  
The mix ratio is 50:1  
The engine used on this trimmer is of a 2-cycle  
design. The internal moving parts of the engine,  
f.e., crankshaft bearings, piston pin bearings and  
piston to cylinder wall contact surfaces, require  
oil mixed with the gasoline for lubrication. Failure  
to add oil to the gasoline or failure to mix oil with  
the gasoline at the appropriate ratio will cause  
major engine damage which will void your  
warranty. For your fuel premix, only use Cub  
Cadet Commercial brand 50:1 2-cycle oil or a  
quality oil designed for 2-cycle air cooled  
engines.  
IMPORTANT:  
Do not use BIA or TCW (two-stroke water cooled)  
mix oils!  
Directions for Mixing: (See Chart for Amounts)  
1. Put one-half of the gasoline in a safety approved  
container.  
12  
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FUELING INSTRUCTIONS  
FUEL MIXTURE :  
Always use a spoul or funnel when fueling to  
reduce fuel spillage. Only fill the tank to within 1/4-  
1/2 inch from the top of the tank. Avoid filling to the  
top of the tank filler neck.  
When using Cub Cadet Commercial 50:1 2-cycle  
brand oil, or a quality oil designed for 2-cycle air-  
cooled engines, oil ratio is 50 parts gasoline to 1  
part oil or 50:1.  
CAUTION  
Never use a mixing ratio greater than 50:1  
regardless of the oil package mixing instructions.  
Ratios greater than 50:1,(for example, 60:1,  
80:1, 100:1), reduce the amount of lubrication to  
the internal moving parts of the engine and can  
cause damage.  
NOTE:  
1. Never mix gasoline and oil directly in the  
trimmer fuel tank.  
2. Check for fuel leakage around the tank cap  
and the fuel tank before the operation.  
MIXING INSTRUCTIONS :  
Always mix fuel and oil in a clean container  
approved for gasoline. Mark the container to  
identify it as fuel mix for the trimmer. Use regular  
unleaded gasoline and fill the container with half  
therequired amount of gasoline. Pour the correct  
amount of oil into the container then add the  
remaining amount of gasoline. Close the container  
lightly and shake it momentarily to evenly mix the  
oil and the gasoline before filling the fuel tank on  
the trimmer.  
CAUTION  
1. Do not use National Marine Manufacturer’s  
Association (NMMA) or BIA certified oils. This  
type of 2-cycle engine oil does not have the  
proper additives for air-cooled, 2-cycle  
engines and can cause engine damage.  
2. Do not use automotive motor oil. This type of  
oil does not have the proper additives for air-  
cooled, 2-cycle engines and can cause  
engine damage.  
When refilling the trimmer fuel tank, clean around  
the fuel tank cap to prevent dirt and debris for  
entering the tank during cap removal. Always shake  
the premix fuel container momentarily before filling  
the fuel tank.  
Fi
(Mix Oil and Gasoline)  
Add Oil  
Add Remaining  
Gasoline  
13  
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OPERATION  
A. STARTING:  
WARNING  
Reread the Safety Precautions relating  
to “Starting” on Page 3.  
WARNING  
When the engine starts, the cutting tool may  
rotate even with the throttle trigger in the  
low-speed position possibly causing injury.  
1. When the Engine is Cold.  
c. Close the choke (Ref.3) completely.  
1
STOP  
START  
d. Grasp the throttle trigger (Ref.4) fully, then  
release it slowly while pushing the lock button  
(Ref.5). This sets the throttle trigger at half-  
throttle.  
a. Slide the ignition switch (Ref.1) to the “START”  
position. (Away from the arrow.)  
b. Push the priming pump (Ref. 2) several times.  
14  
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OPERATION  
e. Put the unit on the ground:  
It must rest securely on the engine support and  
deflector. Check that the cutting tool is not  
touching the ground or any other obstacles.  
f. Make sure you have a firm footing:  
Hold the unit with your left hand and press it  
down firmly. Do not stand or kneel on the drive  
shaft.  
g. Pull the starter grip:  
When pulling the starting rope (Ref. 6), use short  
pulls, 1/2 to 2/3 of the rope length.  
Do not let the starter grip snap back - guide it  
slowly into the housing so that the starter rope  
can rewind properly.  
b. Remove the spark plug wire (Ref. 7).  
h. Grasp the trigger immediately after the engine is  
started. This releases the lock button and  
automatically sets the engine to idle.  
c. Unscrew and dry off the spark plug.  
d. Set the ignition switch to “STOP”.  
e. Open the throttle fully .  
2. When the Engine is Warm.  
Restarting the engine after it has been stopped.  
a. Slide the ignition switch to the “START” position.  
b. Push the priming pump several times.  
f. Pull the starter rope several times to clear the  
combustion chamber .  
g. Refit the spark plug and connect the spark plug  
wire.  
c. Set the choke lever to the “FULL OPEN”  
position.  
h. Set the ignition switch to “START”.  
i. Set the choke lever to “FULL OPEN”.  
j. Now start the engine.  
d. Pull the starter grip.  
NOTE:  
If the engine does not start after four pulls, use  
the cold start procedure.  
3. If the Engine Doesn't Start.  
a. If you did not move the choke lever to the “FULL  
OPEN” position quickly enough after the engine  
began to fire, the combustion chamber has  
flooded.  
15  
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OPERATION  
B. STOPPING:  
1
1. Return the throttle to the “IDLE” position and let  
the engine run for 2 or 3 minutes until it has  
cooled down.  
2. Slide the ignition switch (Ref.1) to the “STOP”  
position.  
WARNING  
Reread the Safety Precautions relating  
to “Operation” on Page 4.  
16  
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MAINTENANCE  
NOTE:  
MAINTENANCE, REPLACEMENT, OR REPAIRE OF THE EMISSION CONTROL DEVICE AND  
SYSTEMS MAY BE PERFORMED BY ANY NONROAD ENGINE REPAIRE ESTABLISHMENT OR  
INDIVIDUAL.  
MAINTENANCE CHART  
PART  
MAINTENANCE BEFORE MONTHLY YEARLY  
USE  
IF  
IF  
SEE  
FAULTY DAMAGED PAGE  
Complete Machine  
Visual Inspection  
(Condition, Leaks)  
Clean  
X
24  
X
X
Control Handle  
Fuel Filter  
Check Operation  
Check  
10  
23  
X
X
X
Replace  
Adjust  
X
Carburetor  
Cooling System  
Muffler  
X
X
18,19  
21,22  
22  
Clean  
X
X
Check  
Clean  
Fuel Leakage  
Fuel Lines  
Check  
3
23  
22  
Repair  
X
X
X
Check  
Replace  
Check/Clean  
Replace  
Clutch and  
X
Clutch Drum  
All Accessible Screws  
and Nuts  
Retighten  
X
X
3
4,5,6  
4
(Not Adjusting Screws)  
Visual Inspection  
Replace  
X
Cutting Tools  
Sharpen Metal  
Cutting Tools  
Check Tightness  
of Cutting Tool  
X
X
4,9,10,11  
23  
Gearbox Lubrication Check  
Fill Full  
X
X
X
X
Drive Shaft Lubrication Check  
23  
Replenish  
17  
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MAINTENANCE  
EMISSION PARTS MAINTENANCE CHART  
PART  
MAINTENANCE  
BEFORE MONTHLY or  
THREE MONTHS or SIX MONTHS or YEARLY or  
SEE  
USE  
50 HOURS USE 150 HOURS USE  
300 HOURS USE 600 HOURS USE  
PAGE  
Air Filter  
Element  
Clean  
X
21  
20  
Replace  
X
X
Spark Plug Check / Clean / Adjust  
Replace  
X
X
Carburetor  
Clean (*1)  
18,19  
Overhaul (*2) / Replace (*3)  
X
(*1) • At an authorized Cub Cadet Commercial servicing facility to be charged.  
(*2) • For consumer use / At an authorized Cub Cadet Commercial servicing facility to be charged.  
(*3) • For commercial use / At an authorized Cub Cadet Commercial servicing facility to be charged.  
NOTE:  
Time intervals shown are a maximum. Actual use and your experience will determine the frequency of  
required maintenance.  
You should be charged for the cost of any required replacement except warranty replacement under  
LIMITED WARRANTY and/or EMISSION CONTROL WARRANTY.  
A. CARBURETOR ADJUSTMENT.  
H
L
The carburetor is preset at the factory. This is the  
optimum setting under the barometric pressure and  
climatic conditions at the factory and is suitable for  
most operating sites.  
It ensures that your machine will run smoothly, be  
fuel efficient, operate reliably and produce low  
emissions.  
If the engine runs unsatisfactorily at high altitudes  
or at sea level, slight readjustment of the carburetor  
may be necessary:  
I
NOTE  
3. Mount the cutting tool.  
a. Nylon line trimmer head:  
Every unit is run at the factory and the carburetor is  
set in compliance with EPA. In addition, the  
carburetor is equipped with H and L needle  
adjustment limiters that prevent settings outside  
acceptable limits.  
Trim lines to the correct length. (The lines must  
extend as far as the line limiting blade on the  
deflector.  
1. Check the air filter and clean it if necessary.  
4. Start the engine and adjust the idling speed  
correctly with the idle speed adjusting screw  
(Ref. I). The cutting tool must not rotate.  
2. Check the spark arresting screen (if fitted) and  
clean it if necessary.  
5. Warm up the engine.  
18  
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MAINTENANCE  
6. Adjusting the idle speed:  
It is usually necessary to change the setting of  
the idle speed adjusting screw (Ref. I) after every  
correction to the low speed adjusting screw (Ref.  
L).  
7. Proper idling speed:  
ST23,26............. 2,800-3,000 rpm  
ST35.................. 2,500-2,700 rpm  
8. The engine stops while idling:  
Turn the idle speed adjusting screw (Ref. I)  
clockwise until the engine runs smoothly, but the  
cutting tool must not rotate.  
9. The cutting tool rotates when the engine is  
idling:  
Turn the idle speed adjusting screw (Ref. I)  
counterclockwise until the cutting tool stops  
rotating then return the screw about another half  
turn from that position.  
10. Erratic idling behavior, poor acceleration:  
The idle setting is too lean. Turn the low speed  
adjusting screw (Ref. L) counterclockwise until  
the engine runs and accelerates smoothly.  
11. Adjusting high speed:  
Adjust the low adjustment screw (Ref. L) for the  
smooth engine idling. Then increase the engine  
speed and adjust the high speed adjustment  
screw (Ref. H) for stable engine rotation. The  
engine acceleration should be smooth with  
proper adjustment.  
(High Engine Speed..........10,000-11,000 rpm)  
19  
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MAINTENANCE  
B. THE THROTTLE WIRE ADJUSTMENT  
C. CHECKING THE SPARK PLUG.  
0.5mm-0.6mm  
0.020”-0.024”  
A
The wrong fuel mix (too much engine oil in the  
gasoline), a dirty air filter or unfavorable running  
conditions (mostly at low throttle) affect the  
condition of the spark plug. These factors cause  
deposits to form on the insulator nose which may  
result in faulty operation.  
1. If the engine doesn't seem to have any power, is  
difficult to start or runs poorly at idling speed, first  
check the spark plug.  
1
2. Remove the spark plug and see "3. If the Engine  
Doesn't Start" on page 14.  
3. Clean the dirty spark plug.  
4. Check the electrode gap.  
It should be 0.20in.(0.5mm) - 0.024in.(0.6mm)  
Re-gap if necessary.  
5. Use only a suppressed spark plug of the  
approved type:  
NGK BPMR7A  
Correct the problems which caused the fouling of  
the spark plug:  
1. Maintain a wire end-play of about 1/16 inch (1-  
2mm) with the adjuster and fix it with the  
tightening bolt (Ref.2).  
Incorrect carburetor setting, too much oil in the  
fuel mix, dirty air filter, unfavorable running  
conditions, e.g. operating at partial load.  
WARNING  
To reduce the risk of injury from loss of control,  
maintain the wire end-play at about 1/16 inch  
(1-2mm). If the wire end-play is not maintained,  
engine speed may be enough for the clutch to  
engage and turn the cutting tool.  
20  
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MAINTENANCE  
D. CLEANING THE AIR FILTER.  
Dirty air filters reduce engine power, increase fuel consumption and make starting more difficult.  
If there is a noticeable loss of engine power:  
ST23, 26  
1
ST35  
3
4
5
1. Turn the choke lever (Ref. 1) to “CLOSE”.  
Loosen the screw (Ref. 2) and remove the air  
filter cover (Ref. 3).  
IMPORTANT  
To maintain proper engine operating  
temperatures, cooling air must pass freely  
through the cylinder fin area. This flow of air  
carries combustion heat away from the engine.  
2. Remove the foam element (Ref 4) and felt  
element (Ref.5).  
3. Wash the air filter in warm, soapy water and dry.  
4. Always replace a damaged foam element.  
5. Fit the foam element in the filter housing.  
6. Fit the filter cover and engage it in position.  
7. Tighten the screw firmly.  
w  
A
E. COOLING SYSTEM MAlNTENANCE.  
The cooling system relies on cooling air entering  
the engine through the bottom engine grille located  
between the fuel tank and starter. The  
cooling fan pushes this air through the cylinder fin  
area and out the rear grille openings in the engine  
cover.  
Anake  
Overheating and engine seizure can occur when:  
1. Air intakes are blocked, preventing cooling air  
from reaching the cylinder.  
21  
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MAINTENANCE  
2. Dust and grass build up on the outside of the  
cylinder. This buildup insulates the engine and  
prevents the heat from leaving.  
2. Place the piston at top dead center. Clean any  
deposits from the muffler and the cylinder  
exhaust port with a nonmetallic scraper.  
Removal of cooling passage blockages or cleaning  
of cylinder fins is considered “Normal  
Maintenance”. Any resultant failure attributed to  
lack of maintenance is not warranted.  
This procedure requires specialized engine service  
techniques and the proper tools. Contact the  
authorized Cub Cadet Commercial dealer where  
you bought your trimmer or your nearest Cub Cadet  
Commercial Service Center.  
F. CLEANING THE CYLINDER FINS.  
IMPORTANT  
(Check Periodically)  
Do not use a metal tool to scrape carbon from  
the exhaust port. Be careful not to scratch the  
cylinder or piston when cleaning the cylinder  
exhaust port.  
1. Remove any dust and dirt from between the fins.  
2. If greater access is needed to thoroughly clean  
the fins, remove the engine cover as illustrated.  
3. Inspect the gasket, and replace it if necessary.  
4. Install the muffler.  
Cylinder fins  
5. Fit the gasket and cover.  
H. CLEANING THE CLUTCH AND  
CLUTCH DRUM.  
Clutch  
C
G. CLEANING THE EXHAUST PORT.  
Exhau
1. Loosen the four screws and remove the fan  
housing.  
2. Clean the dirty clutch and clutch drum.  
Gas
3. Always replace a damaged clutch and clutch  
drum.  
1. Remove the muffler and gasket.  
22  
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MAINTENANCE  
1. Remove the filler plug.  
I. FUEL SYSTEM.  
2. Check the level and add grease, if necessary,  
using a pressure pump. Leave about 5-10 g (1/4  
oz.) for any expansion of grease.  
NOTE:  
Use a good quality lithium multipurpose grease.  
DO NOT overfill the housing.  
3. Tighten the filler plug firmly.  
K. LUBRICATING THE DRIVE SHAFT.  
Shaft  
1. Change the fuel pick up body every year.  
2. Before storing your machine for a long period,  
drain and clean the fuel tank and run the engine  
until the carburetor is dry.  
Drive shaft  
3. The fuel tank and the container in which the fuel  
mix is stored should be cleaned from time to  
time.  
1. Pull the shaft out of the drive tube.  
J. LUBRICATING THE GEAR HEAD.  
2. Use a good quality lithium multipurpose grease  
to coat any dry areas of the shaft. Do not apply  
too much grease. Never pump grease into the  
drive tube.  
Filler plug  
23  
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TROUBLESHOOTING GUIDE  
PROBLEM  
CAUSE  
SOLUTION  
No Fuel at Carburetor  
Fuel Filter Dirty  
Fuel Line Clogged  
Carburetor  
Replace  
Clean  
See your Cub Cadet dealer  
No Fuel at Cylinder  
Muffler Wet with Fuel  
Carburetor  
See your Cub Cadet dealer  
Fuel Mixture is too Rich  
Open Choke  
Clean/Replace Air Filter  
Adjust Carburetor  
See your Cub Cadet dealer  
No Spark at Plug End of Wire  
No Spark at Spark Plug  
Ignition Switch Off  
Electrical Problem  
Turn Switch On  
See your Cub Cadet dealer  
Spark Gap Incorrect  
Covered with Carbon  
Fouled with Fuel  
Re-gap 0.22in.(0.55mm)  
Clean or Replace  
Clean or Replace  
Replace  
Spark Plug Defective  
Engine Does Not Crank or Turn Over Internal Engine Problem  
See your Cub Cadet dealer  
Engine Dies or Accelerates Poorly  
Air Filter Dirty  
Clean or Replace  
Fuel Filter Dirty  
Replace  
Fuel Vent Plugged  
Spark Plug  
Clean Fuel Vent  
Clean and Adjust or Replace  
Carburetor  
Adjust  
Clean  
Clean  
Clean  
Cooling System Plugged  
Exhaust Port Fouled  
Spark Arrestor Screen Plugged  
No Rotation of Cutting Tool  
Incorrect Mounting  
Twining of String or Grass  
Around Cutting Tool  
Remount  
Clean  
Wear of Clutch Shoe or Drum  
Replace  
Grass or Brush Not Being Cut  
Excessive Vibration  
Dull Cutting Tool  
Tool Not Mounted Properly  
Resharpen and Remount  
Remount Tool Properly  
Loosened Bolt Securing the Tool Tighten  
Incorrect Mounting  
Remount  
Bent or Damaged Cutting Tool  
Cutting Tool Out of Balance  
Loosened Bolt And Nut  
Replace Tool  
Replace Tool  
Tighten  
24  
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MANUFACTURER’S LIMITED WARRANTY FOR:  
Cub Cadet Corporation's limited warranty promises to you, the original retail purchaser, that the unit of Cub Cadet Commercial hand held power  
equipment you purchased (the "Product") will be free from defects in material and workmanship for, as applicable: a period of one (1) year from the  
date of retail purchase for commercial purchasers and/or users, and a period of two (2) years from the date of retail purchase for residential purchasers  
and/or users (the "Warranty period"). Cub Cadet Commercial agrees to repair or replace, at Cub Cadet Commercial's option, any defective Product free  
of charge during the applicable Warranty Period. Upon completion of your purchase, the Serial Number of the Product will be registered with Cub  
Cadet Corporation. This will initiate and validate your limited warranty and the applicable Warrnty Period. Please keep your purchase receipt and  
present it to an authorized Cub Cadet Commercial servicing facility for warranty service. Parts replaced or repaired under this limited warranty are  
warranted only to the end of the Warranty Period. All defective parts replaced under this Limited Warranty become the property of Cub Cadet  
Corporation. For warranty service, you must, at your own expense, deliver the Product to, and pick it up from, an authorized Cub Cadet Commercial  
servicing facility. To locate your nearest authorized Cub Cadet Commercial servicing facility, call Cub Cadet Corporation at 330-273-4550.  
EXTENDED LIFETIME OF THE PRODUCT LIMITED WARRANTY FOR STRING TRIMMER SHAFT AND TUBE.  
If applicable, Cub Cadet Corporation’s limited warranty further promises to you, the original retail purchaser, that the shaft and tube of the string  
trimmer unit you purchased will be free from defects in material and workmanship for the expected life of the Products not to exceed ten (10) years  
from the date of retail purchase (“Extended Warranty Period”). Cub Cadet Commercial agrees to repair or replace at Cub Cadet Commercial’s option,  
any defective shaft and/or tube of a string trimmer unit free of charge during the Extended Warranty Periond. Parts replaced or repaired under this  
limited warranty are warranted only to the end of the Extended Warranty Period.  
This limited warranty is given by Cub Cadet Commercial to the original retail purchaser only, and is not transferable to subsequent owners. This  
warranty does not cover damage to the Product resulting from any cause other than defects in material or workmanship. This warranty specifically  
does not cover  
damage caused by:  
1. Lack of lubrication or engine failure due to the use of oils other than Cub Cadet Commercial-approved oils.  
2. The use of gasohol containing methyl (wood) alcohol or gasoline containing less than 89 octane. Only use gasoline which contains 89 octane or  
higher or gasohol which contains a maximum 10% ethyl (grain) alcohol or 15% MTBE (methyl tertiary-butyl ether). (The prescribed mixing  
ratio of gasoline to oil is listed on the Cub Cadet Commercial oil label.)  
3. Defects, malfunctions or failures resulting from abuse, misuse, modifications, alterations, improper servicing or maintenance, improper storage,  
use of unauthorized attachments, including, without limitation, failure to provide or perform required maintenance services as described in the  
Operator's Manual.  
4. Tampering with engine speed governors or running engines above specified and recommended engine speeds.  
5. Dirt, salt water corrosion, rust, varnish and moisture.  
6. Operation of the Product with improperly serviced, damaged or removed air filter.  
7. Failure to follow the set-up, pre-delivery service and adjustments outlined in the Operator's Manual.  
8. Parts which are not warranted. (This limited warranty does not cover parts which are normal wear or maintenance items, including, without  
limitation, spark plugs, filters, lubricants, engine tune-up parts, spark arrestor screen, cutting line and starter cords.)  
9. Engine damage caused by the use of ether or any starting fluids.  
10. Damage caused by the pressure of steam cleaning the Product.  
11. Repairs or alterations made to the Product by an unauthorized party.  
THIS LIMITED WARRANTY IS IN PLACE OF ALL OTHER EXPRESS AND IMPLIED WARRANTIES. ANY IMPLIED WARRANTY, SUCH  
AS FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY, IS EXCLUDED. REPAIR OR REPLACEMENT UNDER THIS  
LIMITED WARRANTY IS EXPRESSLYAGREED TO BE THE EXCLUSIVE REMEDY. CUB CADET CORPORATION WILL NOT BE LIABLE  
FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES.  
SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION MAY  
NOT APPLY TO YOU. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL  
DAMAGES, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND  
YOU MAYALSO HAVE OTHER LEGAL RIGHTS WHICH VARY FROM STATE TO STATE.  
HOW TO ORDER PARTS  
Contact your Cub Cadet Commercial Salesperson, OR phone us (use the numbers below), OR write us (use the address below).  
We will need the following information:  
1. Your account number if available.  
2. Your name and address and the address where you want the parts to be shipped.  
3. The Model/Serial No. of the equipment.  
4. The Cub Cadet Commercial Part No. and the quantity desired. (Please do not use reference numbers.)  
NOTE: Inspect all shipments on receipt for damage or missing parts. File a claim with the carrier before accepting a damaged shipment.  
We reserve the right to change designs, specifications and equipment at any time without notice and without incurring any obligations.  
CUB CADET CORPORATION, P.O.Box 368023,  
Cleveland, OH 44136-9723  
Phone (330) 273-4550, Fax (330) 225-9133  
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U. S. EPA EMISSION CONTROL WARRANTY STATEMENT  
YOUR WARRANTY RIGHTS AND OBLIGATIONS  
The U.S. Environmental Protection Agency (EPA), Cub Cadet Corporation and the engine manufacturer for this  
equipment, Ishikawajima Shibaura Machinery Co., Ltd. (ISM), are pleased to explain the federal emission control  
systems warranty on your engine.  
In the U. S. (exclude the state of California), new 1997 and later model year engines must be designed, built, and  
equipped, at the time of sale, to meet the EPA regulations for small nonroad engines. The engine must be free from  
defects in materials and workmanship during the period of warranty coverage (see PERIOD OF WARRANTY  
COVERAGE below). ISM must warrant the emission control system on your engine for that period provided there has  
been no abuse, neglect or improper maintenance of your engine.  
Your emission control system may include parts such as the carburetor and the ignition system (see EMISSION  
CONTROL WARRANTY PARTS LIST below).  
Where a warrantable condition exists, Cub Cadet Corporation will repair your engine at no cost to you, including  
diagnosis, parts, and labor, on behalf of ISM. While ISM is ultimately responsible for this warranty, Cub Cadet  
Corporation has agreed to carry out ISM’s warranty repair responsibilities, and Cub Cadet Corporation should be your  
primary contact for emission-related warranty service.  
PERIOD OF WARRANTY COVERAGE  
1997 and later utility and small nonroad engines are warranted for two years. If any emission-related part on your  
engine is defective, the part will be repaired or replaced by Cub Cadet Commercial on behalf of ISM.  
OWNER’S RESPONSIBILITIES  
(a) As the engine owner, you are responsible for the performance of the required maintenance listed in your Operator’s  
Manual. Cub Cadet Commercial and ISM recommend that you retain the original purchase documentation and all  
receipts covering maintenance on your engine, but Cub Cadet Commercial and ISM cannot deny warranty solely  
for the lack of receipts or for your failure to ensure the performance of all scheduled maintenance.  
(b) As the engine owner, you should be aware, however, that Cub Cadet Commercial and ISM may deny you warranty  
coverage if your engine or a part has failed due to abuse, neglect, improper maintenance or unapproved  
modifications.  
(c) You are responsible for presenting your engine to an authorized Cub Cadet Corporation servicing facility as soon  
as a problem exists. The warranty repairs should be completed in a reasonable amount of time, not to exceed 30  
days.  
If you have any questions regarding your warranty rights and responsibilities, call Cub Cadet Corporation at 330-273-  
4550. You may also contact ISM’s representative at 1-916-431-6677.  
WARRANTY STATEMENT  
The warranty period referred to above begins on the date the equipment (or engine if sold separately) is first soled to a  
retail purchaser.  
ISM warrants to the initial retail purchaser and each subsequent owner that this engine is designed, built, and equipped  
to conform at the time of initial sale to all applicable regulations of EPA, and that the engine is freeof defects in  
materials and workmanship that would cause it to fail to conform with EPA regulations during its warranty period.  
For the parts listed under EMISSION CONTROL WARRANTY PARTS LIST below, an authorized Cub Cadet Commer-  
cial servicing facility will, at no cost to you, make the necessary diagnosis, repair, or replacement of any defective part  
to ensure that the engine complies with applicable EPA regulations.  
Any warranted part which is not scheduled for replacement as required maintenance, or which is scheduled only for  
regular inspection, is warranted for the warranty period. Any part repaired or replacement part installed under this  
warranty shall be warranted for the remainder of the warranty period.  
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WARRANTY STATEMENT (continued)  
Any warranted part which is scheduled for replacement as required maintenance is warranted for the period of time up  
to the point of first scheduled replacement. A replacement part installed prior to the first scheduled replacement due  
to a defect in the original part shall be warranted until the date of the first scheduled replacement. The owner is  
responsible for the performance of all required maintenance listed in the Operator’s Manual.  
EMISSION CONTROL WARRANTY PARTS LIST  
The parts listed below are covered by this warranty.  
-
-
-
-
-
-
Carburetor  
Ignition system (ignition module)  
Spark plug  
Air filter element  
Insulator (intake manifold)  
Fasteners for emission-related parts  
Any parts replaced under this warranty become the property of Cub Cadet Commercial and ISM.  
WHAT IS NOT COVERED  
This warranty shall not cover any of the following:  
(a) Conditions resulting from tampering, misuse, abuse, improper adjustment, engine alteration, use of add-on or  
modified parts, use of replacement parts that are not approved by ISM, accident, failure to use the recommended  
fuel or oil, use of additives to fuel or oil, use of stale fuel more than 30 days old, or not performing required  
maintenance.  
(b) Replacement parts used for required maintenance.  
(c) Consequential damages such as loss of time, inconvenience, or loss of use of this engine or equipment; however,  
Cub Cadet Commercial and ISM are liable for damages to other engine components caused by the failure of a  
warranted part while it is still under warranty.  
(d) Damages or repair costs caused by the owner’s unreasonable delay in making the engine available for inspection  
and repair.  
(e) Fees for diagnosis or inspection that does not result in eligible warranty service being performed.  
(f) Any replacement parts that are not approved by ISM, or malfunction of approved parts due to use of unapproved  
parts.  
Subject to the limitation above, non-warranty maintenance of emission control parts that is required in Operator’s  
Manual may be performed by the owner, or by any repair establishment or individual, without affecting coverage under  
this warranty; however, warranty repairs must be performed by an authorized Cub Cadet Commercial servicing facility.  
The use of parts that are not equivalent in performance and durability to ISM-approved parts may impair the  
effectiveness of the emission control system and prevent coverage under this warranty. If non ISM-approved parts are  
used for non-warranty maintenance or replacement on this engine, you should assure yourself that such parts are  
warranted by their manufacturer to be equivalent to ISM-approved parts in performance and durability.  
HOW TO OBTAIN WARRANTY SERVICE  
To obtain service under this warranty, promptly take your engine to the nearest authorized Cub Cadet Commercial  
servicing facility. If available, bring the original purchase receipt (showing the initial date of purchase) and all available  
maintenance records.  
If you need assistance in locating the nearest authorized Cub Cadet Commercial servicing facility or have any  
questions regarding your warranty rights and responsibilities, call Cub Cadet Corporation at 330-273-4550. You may  
also contact ISM’s representative at 1-916-431-6677.  
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ST23  
ST26  
ST35  
Trimmers  
Parts List  
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ENGINE, ST23 TRIMMER  
48  
50  
49  
37  
41  
38  
47  
34  
33  
36  
21  
23  
24  
42  
25  
35  
28  
51  
22  
40  
52  
29  
43  
35  
58  
27  
44  
31  
26  
46  
33  
45  
30  
55  
53  
4
3
6
32  
2
54  
5
6
10  
56  
7
57  
91  
70  
12  
14  
19  
15  
62  
61  
13  
1
13  
9
90  
88  
11  
89  
16  
8
66  
10  
33  
81  
82  
59  
67  
68  
20  
87  
69  
78  
77  
80  
79  
63  
76  
64  
75  
74  
83  
18  
72  
17  
35  
65  
73  
47  
84  
85  
71  
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ENGINE, ST23 TRIMMER – PARTS LIST  
Ref. Parts  
No. No.  
No.  
Ref. Parts  
No. No.  
No.  
Ref. Parts  
No. No.  
No.  
Used  
Description  
Used  
Description  
Used  
Description  
1 IM-115253421 Crankshaft ........................ 1  
2 IM-034309031 Key ................................... 1  
3 IM-115013300 Piston Assembly (Includes  
2 Ref. 4) ............................ 1  
4 IM-115113650 Ring, Piston ...................... 2  
5 IM-115323130 Pin, Piston ........................ 1  
6 IM-198343210 Clip, Piston Pin ................. 2  
7 IM-042709007 Bearing, Needle ................ 1  
8 IM-110035180 Crankcase Assembly  
(Includes 1 ea. Ref. 9,10  
26 IM-150265091 Spark Plug ........................ 1  
27 IM-150103460 Flywheel, Magneto ........... 1  
28 IM-170033220 Clutch Assembly ............... 1  
29 IM-199213150 Spacer .............................. 2  
30 IM-199213221 Spacer .............................. 2  
31 IM-199433071 Bolt ................................... 2  
32 IM-020109118 Nut .................................... 1  
33 IM-010709009 Bolt, M5x20....................... 5  
34 IM-175103460 Housing, Blower ............... 1  
35 IM-010709008 Bolt, M5x16....................... 8  
36 IM-170333220 Drum, Clutch ..................... 1  
37 IM-036100010 Snap Ring, S-10 ............... 1  
38 IM-298111010 Grommet ........................... 1  
40 IM-010709011 Bolt, M5x30....................... 1  
41 IM-020109131 Nut .................................... 1  
42 IM-110213550 Cylinder ............................ 1  
43 See Ref.86 - Gasket, Muffler ..................... 1  
44 IM-135403500 Muffler ............................... 1  
45 IM-135493090 Arrester ............................. 1  
46 IM-110993390 Gasket, Cylinder ............... 1  
47 IM-010709016 Bolt, M5x48....................... 4  
48 IM-175154060 Cowling, Cylinder .............. 1  
49 IM-135433470 Baffle Plate ....................... 1  
50 IM-190333330 Trade Mark ....................... 1  
51 See Ref.86 - Gasket, Insulator .................. 1  
52 IM-199513501 Insulator ............................ 1  
53 IM-125543100 Adjuster ............................ 1  
54 IM-010709006 Bolt, M5x12....................... 4  
55 IM-020100005 Nut .................................... 1  
56 IM-026100005 Washer ............................. 2  
57 IM-010709010 Bolt, M5x25....................... 2  
58 See Ref.86 - Gasket .................................. 1  
59 IM-130104240 Carburetor Assembly  
60 IM-130153240 Valve, Float ....................... 1  
61 IM-130123350 Gasket .............................. 1  
62 IM-130283357 Diaphragm, Metering ........ 1  
63 IM-130513409 Diaphragm, Pump ............. 1  
64 IM-130513413 Gasket .............................. 1  
65 IM-198113900 Rubber .............................. 1  
66 IM-135713490 Case, Air Silencer ............. 1  
67 IM-135263310 Element “B”, Air Filter ....... 1  
68 IM-135263300 Element “A”, Air Filter ....... 1  
69 IM-135713480 Cap, Case ......................... 1  
70 IM-125504680 Wire Complete, Throttle .... 1  
71 IM-160113270 Tank, Fuel ......................... 1  
72 IM-160033200 Cap Assembly, Fuel Tank  
(Includes 1 Ref. 73) ......... 1  
73 IM-160993100 Gasket .............................. 1  
74 IM-130303290 Filter, Fuel ......................... 1  
75 IM-198343181 Clip ................................... 1  
76 IM-130983060 Hose ................................. 1  
77 IM-198113730 Rubber .............................. 1  
78 IM-068209150 Hose ................................. 1  
79 IM-198113560 Rubber .............................. 1  
80 IM-068209177 Hose ................................. 1  
81 IM-160043121 Valve, Reversing ............... 1  
82 IM-198343060 Clip ................................... 1  
83 IM-198483100 Connector ......................... 1  
84 IM-198113701 Rubber .............................. 2  
85 IM-198113740 Rubber .............................. 1  
86 IM-135994150 Gasket Kit (Includes 1 ea.  
Ref. 43, 51 and 58) ........... 1  
and 2 ea. Ref. 11) ............. 1  
9 IM-040106000 Bearing, Ball, 6000 ........... 1  
10 IM-050209097 Seal, Oil ............................ 2  
11 IM-030500512 Pin, Dowel ........................ 2  
12 IM-110035131 Crankcase Assembly  
(Includes 1 ea. Ref. 10  
and 19) ............................. 1  
13 IM-199283050 Shim, 0.1mm ....... As Req’d.  
IM-199283060 Shim, 0.2mm ....... As Req’d.  
14 IM-155353090 Pulley Assembly, Starter  
(Includes 1 ea. Ref.15 and  
91) .................................... 1  
15 IM-155163110 Ratchet ............................. 1  
16 IM-155103461 Recoil Assembly (Includes  
1 ea. Ref.17, 18, 88, 89  
and 90) ............................. 1  
17 IM-155213050 Rope, Starter .................... 1  
18 IM-155223061 Knob, Starter .................... 1  
19 IM-040106200 Bearing, Ball, 6200 ........... 1  
20 IM-190285420 Name Plate ....................... 1  
21 IM-150053291 Coil Assembly, Ignition ...... 1  
22 IM-199513451 Insulator ............................ 1  
23 IM-010709018 Bolt, M4x20....................... 2  
24 IM-198213300 Spring ............................... 1  
25 IM-150413033 Cap, Plug .......................... 1  
87 IM-125683061 Wire Holder ....................... 1  
88 IM-155183121 Reel .................................. 1  
89 IM-155263270 Spring, Spiral .................... 1  
90 IM-155343050 Screw ................................ 1  
91 IM-155263261 Spring, Return .................. 1  
(Includes 1 ea. Ref. 60, 61,  
62, 63, 64 and 65) ............ 1  
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SHAFT, ST23 TRIMMER  
32  
Optional  
14  
28  
35  
10  
33  
30  
29  
2
36  
37  
15  
47  
3
2
17  
18  
19  
58  
7
8
50  
0  
4
38  
40  
39  
41  
5
1
24  
54  
2
2
55  
11  
56  
53  
6
51  
57  
52  
12  
9
10  
13  
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SHAFT, ST23 TRIMMER – PARTS LIST  
Ref. Parts  
No. No.  
No.  
Ref. Parts  
No. No.  
No.  
Used  
Ref. Parts  
No. No.  
No.  
Used  
Description  
Used  
Description  
Description  
1 IM-720113160 Shaft, Drive ....................... 1  
2 IM-720124320 Pipe, Complete (Includes  
6 Ref. 3) ............................ 1  
3 IM-720133160 Metal ................................. 6  
4 IM-720203082 Hanger .............................. 1  
5 IM-720973178 Bolt, M6x14....................... 1  
6 IM-720623400 Grip ................................... 1  
7 IM-125034130 Lever Assembly, Throttle  
(Includes 1 Ref. 8) ............ 1  
8 IM-125504820 Wire Complete, Throttle .... 1  
9 IM-720473180 Plate ................................. 1  
10 IM-010709009 Bolt, M5x20....................... 6  
11 IM-720043511 Deflector Assembly, Plastic  
(Includes 1 Ref.12 and 13) 1  
28 IM-720053800 Handle, Loop (Includes  
Optional  
2 Ref. 29) .......................... 1  
29 IM-720973177 Bolt, M6x12....................... 2  
30 IM-720983371 Wrench, Spanner Box 19 . 1  
31 IM-090500004 Wrench, Key, 4mm ........... 1  
32 IM-720983420 Bag, Tool ........................... 1  
33 IM-100814820 Manual, Operator’s ........... 1  
38 IM-198113780 Rubber .............................. 1  
39 IM-720973673 Bolt, 5x8 ............................ 1  
40 IM-199233430 Collar ................................ 1  
41 IM-026100005 Washer, 5mm.................... 1  
47 IM-720263660 Case ................................. 1  
48 IM-720273190 Gear Assembly ................. 1  
49 IM-720293360 Shaft ................................. 1  
35 IM-195833140 Blade, 4 Tooth ................... 1  
36 IM-195833170 Blade, 8 Tooth ................... 1  
37 IM-195833230 Blade, Circular .................. 1  
50 IM-720463430 Deflector, Steel ................. 1  
51 IM-720053910 Handle Assembly, Loop  
(Includes 2 Ref. 52) .......... 1  
52 IM-720973183 Bolt, M6x18....................... 2  
53 IM-720613420 Handle .............................. 1  
54 IM-125034241 Lever Assembly, Throttle .. 1  
55 IM-720623520 Grip Assembly .................. 1  
56 IM-720063260 Holder Assembly, Handle . 1  
57 IM-720973147 Coller ................................ 1  
58 IM-720853461 Harness, Shoulder ............ 1  
12 IM-720493060 Cutter ................................ 1  
13 IM-010709008 Bolt, M5x16....................... 1  
14 IM-720023990 Case Assembly, Gear  
(Includes 1 ea. Ref. 15, 16,  
17, 18, 19, 21, 22, 47, 48,  
49 and 2 ea. Ref. 10 and  
20) .................................... 1  
15 IM-720973663 Bolt, M6x8 ......................... 1  
16 IM-720973175 Bolt, M5x10....................... 1  
17 IM-036500024 Snap Ring, R-24 ............... 1  
18 IM-036100009 Snap Ring, S-9 ................. 1  
19 IM-720973161 Bearing, Ball, 609ZZ ......... 1  
20 IM-720973159 Bearing, Ball, 609 ............. 2  
21 IM-040146001 Bearing, Ball, 6001LL ....... 1  
22 IM-036500028 Snap Ring, R-28 ............... 1  
23 IM-720333630 Holder ............................... 1  
24 IM-720343890 Cover ................................ 1  
25 IM-720333610 Holder ............................... 1  
26 IM-720343780 Cover, Nut......................... 1  
27 IM-720973715 Nut, LH M10x1.25 ............. 1  
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ENGINE, ST26 TRIMMER  
35  
33  
65  
30  
27  
43  
26  
42  
44  
41  
34  
19  
20  
31  
32  
25  
21  
24  
36  
22  
23  
81  
12  
45  
28  
29  
56  
55  
12  
11  
47  
51  
13  
54  
38  
5
3
37  
39  
2
4
28  
46  
50  
82  
48  
9
6
52  
14  
86  
49  
8
85  
57  
58  
53  
83  
75  
1
8
84  
16  
15  
60  
76  
10  
71  
73  
7
18  
9
72  
59  
74  
77  
70  
69  
67  
68  
26  
61  
17  
62  
63  
78  
79  
66  
64  
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ENGINE, ST26 TRIMMER – PARTS LIST  
Ref. Parts  
No. No.  
No.  
Ref. Parts  
No. No.  
No.  
Ref. Parts  
No. No.  
No.  
Used  
Description  
Used  
Description  
Used  
Description  
1 IM-115253470 Crankshaft ........................ 1  
2 IM-115013311 Piston Assembly (Includes  
2 Ref. 3) ............................ 1  
3 IM-115113650 Ring, Piston ...................... 2  
4 IM-115323040 Pin, Piston ........................ 1  
5 IM-198343210 Clip, Piston Pin ................. 2  
6 IM-042709008 Bearing, Needle ................ 1  
7 IM-110035190 Crankcase Assembly  
(Includes 1 ea. Ref. 8,9  
26 IM-010709009 Bolt, M5x20....................... 4  
27 IM-175103470 Housing, Blower ............... 1  
28 IM-010709008 Bolt, M5x16....................... 5  
29 IM-170333240 Drum, Clutch ..................... 1  
30 IM-036100012 Snap Ring, S-12 ............... 1  
31 IM-199233470 Collar ................................ 1  
32 IM-010709011 Bolt, M5x30....................... 1  
33 IM-020109131 Nut .................................... 1  
34 IM-175423050 Plate ................................. 1  
35 IM-198113890 Rubber .............................. 1  
36 IM-110213560 Cylinder ............................ 1  
37 See Ref.80 - Gasket, Muffler ..................... 1  
38 IM-135403670 Muffler (Includes 1 Ref.39) 1  
39 IM-135493090 Arrester ............................. 1  
41 IM-010709016 Bolt, M5x48....................... 2  
42 IM-175154070 Cowling, Cylinder .............. 1  
43 IM-135433630 Baffle Plate ....................... 1  
44 IM-190333330 Trade Mark ....................... 1  
45 See Ref.80 - Gasket, Insulator .................. 1  
46 IM-010109433 Bolt, M5x56....................... 2  
47 IM-199513510 Insulator ............................ 1  
48 IM-125543100 Adjuster ............................ 1  
49 IM-010709006 Bolt, M5x12....................... 1  
50 IM-020100005 Nut .................................... 1  
51 IM-026100005 Washer ............................. 2  
52 See Ref.80 - Gasket .................................. 1  
53 IM-130104240 Carburetor Assembly  
59 IM-198113900 Rubber .............................. 1  
60 IM-135713490 Case, Air Silencer ............. 1  
61 IM-023100005 Nut .................................... 2  
62 IM-135263310 Element “B”, Air Filter ....... 1  
63 IM-135263300 Element “A”, Air Filter ....... 1  
64 IM-135713450 Cap, Case ......................... 1  
65 IM-125504790 Wire Complete, Throttle .... 1  
66 IM-160113261 Tank, Fuel ......................... 1  
67 IM-160033200 Cap Assembly, Fuel Tank  
(Includes 1 Ref. 78) .......... 1  
68 IM-160993100 Gasket .............................. 1  
69 IM-130303290 Filter, Fuel ......................... 1  
70 IM-198343181 Clip ................................... 1  
71 IM-198163080 Hose ................................. 1  
72 IM-198113730 Rubber .............................. 1  
73 IM-068209150 Hose ................................. 2  
74 IM-198113560 Rubber .............................. 1  
75 IM-160043121 Valve, Reversing ............... 1  
76 IM-198343060 Clip ................................... 1  
77 IM-198483100 Connector ......................... 1  
78 IM-198113620 Rubber .............................. 2  
79 IM-198113740 Rubber .............................. 1  
80 IM-135994160 Gasket Kit (Includes 1 ea.  
Ref. 37, 45 and 52) ........... 1  
and 2 ea. Ref. 10) ............. 1  
8 IM-040106201 Bearing, Ball, 6201 ........... 2  
9 IM-050209070 Seal, Oil ............................ 2  
10 IM-030500512 Pin, Dowel ........................ 2  
11 IM-110035200 Crankcase Assembly  
(Includes 1 ea. Ref. 8 and  
9) ...................................... 1  
12 IM-010709010 Bolt, M5x25....................... 5  
13 IM-155353090 Pulley Assembly, Starter  
(Includes 1 ea. Ref.14 and  
86) .................................... 1  
14 IM-155163110 Ratchet ............................. 1  
15 IM-155103461 Recoil Assembly (Includes  
1 ea. Ref.16, 17, 83, 84  
and 85) ............................. 1  
16 IM-155213050 Rope, Starter .................... 1  
17 IM-155223061 Knob, Starter .................... 1  
18 IM-190285440 Name Plate ....................... 1  
19 IM-150053330 Coil Assembly, Ignition ...... 1  
20 IM-010709018 Bolt, M4x20....................... 2  
21 IM-198213300 Spring ............................... 1  
22 IM-150413033 Cap, Plug .......................... 1  
23 IM-150265091 Spark Plug ........................ 1  
24 IM-150103500 Flywheel, Magneto ........... 1  
25 IM-170033370 Clutch Assembly ............... 1  
81 IM-125683061 Wire Holder ....................... 1  
82 IM-110993420 Gasket, Cylinder ............... 1  
83 IM-155183121 Reel .................................. 1  
84 IM-155263270 Spring, Spiral .................... 1  
85 IM-155343050 Screw ................................ 1  
86 IM-155263261 Spring, Return .................. 1  
(Includes 1 ea. Ref. 54, 55,  
56, 57, 58 and 59) ............ 1  
54 IM-130153240 Valve, Float ....................... 1  
55 IM-130123350 Gasket .............................. 1  
56 IM-130283357 Diaphragm, Metering ........ 1  
57 IM-130513409 Diaphragm, Pump ............. 1  
58 IM-130513413 Gasket .............................. 1  
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SHAFT, ST26 TRIMMER  
32  
Optional  
14  
28  
35  
10  
30  
29  
36  
37  
2
15  
43  
3
2
17  
18  
19  
54  
7
8
46  
4
0  
4
5
1
24  
50  
2
2
51  
52  
49  
6
47  
53  
48  
12  
9
10  
13  
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SHAFT, ST26 TRIMMER – PARTS LIST  
Ref. Parts  
No. No.  
No.  
Ref. Parts  
No. No.  
No.  
Used  
Ref. Parts  
No. No.  
No.  
Used  
Description  
Used  
Description  
Description  
1 IM-720113160 Shaft, Drive ....................... 1  
2 IM-720124330 Pipe, Complete (Includes  
6 Ref. 3) ............................ 1  
3 IM-720133160 Metal ................................. 6  
4 IM-720203082 Hanger .............................. 1  
5 IM-720973178 Bolt, M6x14....................... 1  
6 IM-720623400 Grip ................................... 1  
7 IM-125034130 Lever Assembly, Throttle  
(Includes 1 Ref. 8) ............ 1  
8 IM-125504820 Wire Complete, Throttle .... 1  
9 IM-720473180 Plate ................................. 1  
10 IM-010709009 Bolt, M5x20....................... 6  
11 IM-720043511 Deflector Assembly, Plastic  
(Includes 1 ea. Ref. 12 and  
27 IM-720973715 Nut, LH M10x1.25 ............. 1  
28 IM-720053800 Handle, Loop (Includes 2  
Ref. 29) ............................. 1  
Optional  
35 IM-195833140 Blade, 4 Tooth ................... 1  
36 IM-195833170 Blade, 8 Tooth ................... 1  
37 IM-195833230 Blade, Circular .................. 1  
46 IM-720463430 Deflector, Steel ................. 1  
47 IM-720053910 Handle Assembly, Loop  
(Includes 2 Ref. 48) .......... 1  
48 IM-720973183 Bolt, M6x18....................... 2  
49 IM-720613420 Handle .............................. 1  
50 IM-125034241 Lever Assembly, Throttle .. 1  
51 IM-720623520 Grip Assembly .................. 1  
52 IM-720063260 Holder Assembly, Handle . 1  
53 IM-720973147 Coller ................................ 1  
54 IM-720853461 Harness, Shoulder ............ 1  
29 IM-720973177 Bolt, M6x12....................... 2  
30 IM-720983371 Wrench, Spanner Box 19 . 1  
31 IM-090500004 Wrench, Key, 4mm ........... 1  
32 IM-720983420 Bag, Tool ........................... 1  
33 IM-100814820 Manual, Operator’s ........... 1  
43 IM-720263660 Case, Gear ....................... 1  
44 IM-720273190 Gear Assembly ................. 1  
45 IM-720293360 Shaft ................................. 1  
13) .................................... 1  
12 IM-720493060 Cutter ................................ 1  
13 IM-010709008 Bolt, M5x16....................... 1  
14 IM-720023990 Case Assembly, Gear  
(Includes 1 ea. Ref. 15, 16,  
17, 18, 19, 21, 22, 43, 44,  
45 and 2 ea. Ref. 10 and  
20) .................................... 1  
15 IM-720973663 Bolt, M6x8 ......................... 1  
16 IM-720973175 Bolt, M5x10....................... 1  
17 IM-036500024 Snap Ring, R-24 ............... 1  
18 IM-036100009 Snap Ring, S-9 ................. 1  
19 IM-720973161 Bearing, Ball, 609ZZ ......... 1  
20 IM-720973159 Bearing, Ball, 609 ............. 2  
21 IM-040146001 Bearing, Ball, 6001LL ....... 1  
22 IM-036500028 Snap Ring, R-28 ............... 1  
23 IM-720333630 Holder ............................... 1  
24 IM-720343890 Cover ................................ 1  
25 IM-720333610 Holder ............................... 1  
26 IM-720343780 Cover, Nut......................... 1  
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ENGINE, ST35 TRIMMER  
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ENGINE, ST35 TRIMMER – PARTS LIST  
Ref. Parts  
No. No.  
No.  
Ref. Parts  
No. No.  
No.  
Ref. Parts  
No. No.  
No.  
Used  
Description  
Used  
Description  
Used  
Description  
1 IM-115253440 Crankshaft ........................ 1  
2 IM-034309031 Key ................................... 1  
3 IM-115013280 Piston Assembly (Includes  
2 Ref. 4) ............................ 1  
30 IM-170333140 Drum, Clutch ..................... 1  
31 IM-036500035 Snap Ring, R-35 ............... 1  
32 IM-040126202 Bearing, Ball, 6202ZZ ....... 1  
33 IM-036100015 Snap Ring, S-15 ............... 1  
34 IM-175114580 Housing, Blower ............... 1  
35 IM-298111010 Grommet ........................... 1  
36 IM-198113810 Rubber .............................. 1  
37 IM-165983130 Pipe .................................. 1  
38 IM-036550047 Snap Ring, R-47 ............... 1  
39 IM-010709015 Bolt, M4x12....................... 2  
40 IM-010709013 Bolt, M6x20....................... 1  
41 IM-125504840 Wire Complete, Throttle .... 1  
43 IM-150053320 Coil Assembly, Ignition ...... 1  
44 IM-198213300 Spring ............................... 1  
45 IM-150413033 Cap, Plug .......................... 1  
46 IM-150265091 Spark Plug ........................ 1  
47 IM-010709009 Bolt, M5x20....................... 2  
48 IM-110213540 Cylinder ............................ 1  
49 IM-110993410 Gasket, Cylinder ............... 1  
50 See Ref.95 - Gasket, Muffler ..................... 1  
51 IM-135403492 Muffler ............................... 1  
52 IM-010709040 Bolt, M5x58....................... 2  
53 IM-010709006 Bolt, M5x12....................... 4  
54 See Ref.95 - Gasket, Baffle Plate.............. 1  
55 IM-135493010 Arrester ............................. 1  
56 IM-135433570 Baffle Plate, Outer ............ 1  
57 IM-010709014 Bolt, M4x6 ......................... 4  
58 IM-135433560 Baffle Plate ....................... 1  
59 See Ref.95 - Gasket, Insulator .................. 1  
60 IM-199513550 Insulator ............................ 1  
61 IM-026100005 Washer ............................. 2  
62 IM-010709010 Bolt, M5x25....................... 2  
63 IM-125543090 Adjuster ............................ 1  
64 IM-135263370 Element “B”, Air Filter ....... 1  
65 See Ref.95 - Gasket .................................. 1  
66 IM-130104210 Carburetor Assembly  
68 IM-130123350 Gasket .............................. 1  
69 IM-130283357 Diaphragm, Metering ........ 1  
70 IM-130513409 Diaphragm, Pump ............. 1  
71 IM-130513410 Gasket .............................. 1  
72 IM-198113870 Rubber .............................. 1  
73 See Ref.95 - Gasket, Air Silencer .............. 1  
74 IM-135713373 Case, Air Silencer ............. 1  
75 IM-010709016 Bolt, M5x48....................... 2  
76 IM-135263380 Element “A”, Air Filter ....... 1  
77 IM-135713393 Cap, Case (Includes 1  
4 IM-115113730 Ring, Piston ...................... 2  
5 IM-115323030 Pin, Piston ........................ 1  
6 IM-198343040 Clip, Piston Pin ................. 2  
7 IM-042709006 Bearing, Needle ................ 1  
8 IM-110035150 Crankcase Assembly  
(Includes 1 ea. Ref. 9 and  
10) .................................... 1  
Ref. 78) ............................. 1  
9 IM-040106201 Bearing, Ball, 6201 ........... 2  
10 IM-050209070 Seal, Oil ............................ 2  
11 IM-110035160 Crankcase Assembly  
(Includes 1 ea. Ref. 9, 10  
80 IM-160103330 Tank, Fuel ......................... 1  
81 IM-130303290 Filter, Fuel ......................... 1  
82 IM-198343181 Clip ................................... 1  
83 IM-198163080 Hose ................................. 1  
84 IM-160033200 Cap Assembly, Fuel Tank  
(Includes 1 Ref. 85) .......... 1  
85 IM-160993100 Gasket .............................. 1  
86 IM-175973400 Stay, Stand ....................... 1  
87 IM-175154080 Cowling, Cylinder .............. 1  
88 IM-190333330 Trade Mark ....................... 1  
89 IM-198113730 Rubber .............................. 1  
90 IM-068209150 Hose ................................. 1  
91 IM-160043121 Valve, Reversing ............... 1  
92 IM-068209176 Hose ................................. 1  
93 IM-198113560 Rubber .............................. 1  
95 IM-135994170 Gasket Kit (Includes 1 ea.  
Ref.50, 54, 59, 65 and 73) 1  
96 IM-198343060 Clip ................................... 1  
97 IM-198483100 Connector ......................... 1  
98 IM-125683061 Wire Holder ....................... 1  
99 IM-155183090 Reel .................................. 1  
100IM-155343050 Screw ................................ 1  
101IM-155263200 Spring, Return .................. 1  
102IM-198113940 Rubber .............................. 1  
and 4 ea. Ref. 12) ............. 1  
12 IM-030500512 Pin, Dowel ........................ 4  
13 IM-199283030 Shim, 0.1mm ....... As Req’d.  
IM-199283040 Shim, 0.2mm ....... As Req’d.  
14 IM-010709011 Bolt, M5x30....................... 4  
15 IM-155353060 Pulley Assembly, Starter  
(Includes 1 ea. Ref. 16 and  
101) .................................. 1  
16 IM-155163080 Ratchet ............................. 1  
17 IM-020300008 Nut .................................... 1  
18 IM-155103341 Recoil Assembly (Includes  
1 ea. Ref.19, 20, 21, 99  
and 100) ........................... 1  
19 IM-155263210 Spring, Sprial .................... 1  
20 IM-155223050 Knob, Starter .................... 1  
21 IM-155213090 Rope, Starter .................... 1  
22 IM-010709008 Bolt, M5x16..................... 16  
23 IM-190285460 Name Plate ....................... 1  
24 IM-150103351 Flywheel, Magneto ........... 1  
25 IM-020109107 Nut .................................... 1  
26 IM-170033241 Clutch Assembly ............... 1  
27 IM-199213071 Spacer .............................. 2  
28 IM-199213180 Spacer .............................. 2  
29 IM-199433082 Bolt ................................... 2  
(Includes 1 ea. Ref. 67, 68,  
69, 70, 71 and 72) ............ 1  
67 IM-130153210 Valve, Float ....................... 1  
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SHAFT, ST35 TRIMMER  
Optional  
51  
52  
53  
50  
48  
49  
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SHAFT, ST35 TRIMMER – PARTS LIST  
Ref. Parts  
No. No.  
No.  
Ref. Parts  
No. No.  
No.  
Used  
Ref. Parts  
No. No.  
No.  
Used  
Description  
Used  
Description  
Description  
1 IM-720113120 Shaft, Drive ....................... 1  
2 IM-720124290 Pipe, Complete (Includes 6  
Ref. 3) ............................... 1  
3 IM-720133061 Metal ................................. 6  
4 IM-720203073 Hanger .............................. 1  
5 IM-720973178 Bolt, M6x14....................... 1  
6 IM-720623251 Grip ................................... 1  
7 IM-125034150 Lever Assembly, Throttle  
(Includes 1 Ref. 40) .......... 1  
8 IM-720463430 Deflector, Steel ................. 1  
9 IM-720473180 Plate ................................. 1  
10 IM-010709009 Bolt, M5x20....................... 6  
11 IM-720043511 Deflector Assembly, Plastic  
(Includes 1 ea. Ref. 12 and  
27 IM-720973715 Nut, LH M10x1.25 ............. 1  
28 IM-720053650 Handle, Loop (Includes 2  
Ref. 29) ............................. 1  
OPtional  
36 IM-195833150 Blade, 4 Tooth ................... 1  
37 IM-195833070 Blade, 8 Tooth ................... 1  
38 IM-195833160 Blade, Circular .................. 1  
48 IM-720053910 Handle Assembly, Loop  
(Includes 1 Ref. 49) .......... 1  
49 IM-720973183 Bolt, M6x18....................... 2  
50 IM-720613420 Handle .............................. 1  
51 IM-125034241 Lever Assembly, Throttle .. 1  
52 IM-720623520 Grip Assembly .................. 1  
53 IM-720063260 Holder Assembly, Handle . 1  
29 IM-720973177 Bolt, M6x12....................... 2  
30 IM-720853461 Harness, Shoulder ............ 1  
31 IM-720983371 Wrench, Spanner Box 19 . 1  
32 IM-090500004 Wrench, Key, 4mm ........... 1  
33 IM-720983420 Bag, Tool ........................... 1  
34 IM-100814820 Manual, Operator’s ........... 1  
40 IM-125504820 Wire Compl, Throttle ......... 1  
45 IM-720263670 Case ................................. 1  
46 IM-720273160 Gear Assembly ................. 1  
47 IM-720293370 Shaft ................................. 1  
13) .................................... 1  
12 IM-720493060 Cutter ................................ 1  
13 IM-010709008 Bolt, M5x16....................... 1  
14 IM-720023940 Case Assembly, Gear  
(Includes 1 ea. Ref. 15, 16,  
17, 18, 19, 21, 22, 45, 46  
and 47 and 2 ea. Ref. 10  
and 20) ............................. 1  
15 IM-720973663 Bolt, M6x8 ......................... 1  
16 IM-720973175 Bolt, M5x10....................... 1  
17 IM-036500026 Snap Ring, R-26 ............... 1  
18 IM-036100010 Snap Ring, S-10 ............... 1  
19 IM-040126000 Bearing, Ball, 6000ZZ ....... 1  
20 IM-040106000 Bearing, Ball, 6000 ........... 2  
21 IM-040146001 Bearing, Ball, 6001LL ....... 1  
22 IM-036500028 Snap Ring, R-28 ............... 1  
23 IM-720333630 Holder ............................... 1  
24 IM-720343890 Cover ................................ 1  
25 IM-720333610 Holder ............................... 1  
26 IM-720343780 Cover, Bolt ........................ 1  
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100814820. M2,5. F9. Sh. Printed in Japan.  
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