Troy Bilt Trimmer TB2000 User Manual

Owner/Operator  
Manual  
2-Cycle Trimmer  
• Safety  
• Assembly  
• Operation  
• Maintenance  
Models  
TB2000 – 22.5cc Curved Shaft  
©2000 MTD SOUTHWEST INC  
FORM 182821 (1/01) (10201 rev. A)  
Printed in U.S.A.  
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Service Information  
SERVICE INFORMATION  
Service on this unit both within and after the warranty period should be performed only by an authorized and  
approved service dealer.  
Dial:  
1-800-345-8746 for authorized service dealers in the United States  
Or  
• 1-800-668-1238 in Canada to obtain the listing of the authorized service dealer nearest you.  
DO NOT RETURN THE UNIT TO THE RETAILER.  
NOTE: PROOF OF PURCHASE WILL BE REQUIRED FOR WARRANTY SERVICE.  
Make sure this manual is carefully read and understood before starting or operating this equipment.  
THIS PRODUCT IS COVERED BY ONE OR MORE US PATENTS, OTHER PATENTS PENDING.  
WARNING:  
Engine Exhaust, some of its constituents, and certain vehicle components contain or  
emit chemicals known to State of California to cause cancer and birth defects or other reproductive harm.  
SPARK ARRESTER INFORMATION  
NOTE: For users on U.S. Forest Land and in the states of California, Maine, Oregon and Washington. All  
U.S. Forest Land and the state of California (Public Resources Codes 4442 and 4443), Oregon and Washington  
require, by law that certain internal combustion engines operated on forest brush and/or grass-covered areas be  
equipped with a spark arrestor, maintained in effective working order, or the engine be constructed, equipped and  
maintained for the prevention of fire. Check with your state or local authorities for regulations pertaining to these  
requirements. Failure to follow these requirements could subject you to liability or a fine. This unit is factory  
equipped with a spark arrestor. If it requires replacement, ask your LOCAL SERVICE dealer to install the  
Accessory Part #181696 Spark Arrestor Kit.  
Identification Numbers  
Before you start assembling your new equipment, please locate the model plate on the unit and copy the  
information from it to the space provided below. The information on the model plate is very important if you need  
help from our Customer Support Department or an authorized dealer.  
You can locate the model number on the shaft housing of the unit next to the On/Off Stop Control Switch.  
A sample model plate is explained below. For future reference, please copy the model number and the serial  
number of the equipment in the space below.  
Copy the model / parent  
part number here:  
Copy the serial number here:  
3
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Section 1  
Safety  
The purpose of safety symbols is to attract your  
attention to possible dangers. The safety symbols,  
and their explanations, deserve your careful attention  
and understanding. The safety warnings do not by  
themselves eliminate any danger. The instructions or  
warnings they give are not substitutes for proper  
accident prevention measures.  
Failure to obey a safety warning will result in  
serious injury to yourself or to others. Always fol-  
low the safety precautions to reduce the risk of  
fire, electric shock, and personal injury.  
SYMBOL  
MEANING  
SAFETY ALERT SYMBOL: Indicates  
danger, warning, or caution. Attention is  
required in order to avoid serious personal  
injury. May be used in conjunction with  
other symbols or pictographs.  
Failure to obey a safety warning can result in  
injury to yourself and others. Always follow the  
safety precautions to reduce the risk of fire,  
electric shock, and personal injury.  
NOTE:Advises you of information or instructions  
vital to the operation or maintenance of the  
equipment.  
Failure to obey a safety warning may result in  
property damage or personal injury to yourself  
or to others. Always follow the safety precau-  
tions to reduce the risk of fire, electric shock,  
and personal injury.  
• IMPORTANT SAFETY INFORMATION •  
• Clear the area to be cut before each use. Remove all  
READ ALL INSTRUCTIONS  
objects such as rocks, broken glass, nails, wire, or  
string which can be thrown or become entangled in  
the cutting attachment. Clear the area of children,  
bystanders, and pets. At a minimum, keep all chil-  
dren, bystanders and pets outside a 50 feet (15 m)  
radius; there still may be a risk to bystanders from  
thrown objects. Bystanders should wear eye protec-  
tion. If you are approached, stop the engine and  
cutting attachment immediately.  
BEFORE OPERATING  
• Read the instructions carefully. Be familiar with the  
controls and proper use of the unit.  
• Do not operate this unit when tired, ill, or under the  
influence of alcohol, drugs, or medication.  
• Children and teens under the age of 15 must not use  
the unit, except for teens guided by an adult.  
• Squeeze the throttle control and check that it returns  
automatically to the idle position. Make all adjust-  
ments or repairs before using unit.  
• Inspect the unit before use. Replace damaged parts.  
Check for fuel leaks. Make sure all fasteners are in  
place and secure. Replace cutting attachment parts  
that are cracked, chipped, or damaged in any way.  
Make sure the cutting attachment is properly  
installed and securely fastened. Be sure the cutting  
attachment shield is properly attached, and posi-  
tioned as recommended. Failure to so can result in  
personal injury to the operator and bystanders, as  
well as damage to the unit.  
• This unit was not designed to be used as a brush  
cutter. Do not attach or operate this unit with any  
type of brush cutting blade or brush cutting attach-  
ment.  
SAFETY WARNINGS FOR GAS TRIMMERS  
WARNING: Gasoline is highly flammable, and its  
vapors can explode if ignited. Take the following pre-  
cautions:  
• Use only 0.095 inch (2.41 mm) diameter genuine  
manufacturer’s replacement line. Never use metal-  
reinforced line, wire, chain, or rope, etc. These can  
break off and become a dangerous projectile.  
• Store fuel only in containers specifically designed  
and approved for the storage of such materials.  
• Be aware of the risk of injury to the head, hands and  
feet.  
4
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Safety (continued)  
• Always stop the engine and allow it to cool before  
filling the fuel tank. Never remove the cap of the fuel  
tank, or add fuel, when the engine is hot. Never  
operate the unit without the fuel cap securely in  
place. Loosen the fuel tank cap slowly to relieve any  
pressure in the tank.  
• Always hold the unit with both hands when operat-  
ing. Keep a firm grip on both the front and rear han-  
dle or grips.  
• Keep hands, face, and feet at a distance from all  
moving parts. Do not touch or try to stop the cutting  
attachment when it is rotating.  
• Add fuel in a clean, well-ventilated area outdoors  
where there are no sparks or flames. Slowly remove  
the fuel cap only after stopping engine. Do not  
smoke while fueling or mixing fuel. Wipe up any  
spilled fuel from the unit immediately.  
• Do not touch the engine, gear housing or muffler.  
These parts get extremely hot from operation. When  
turned off they remain hot for a short time.  
• Do not operate the engine faster than the speed  
needed to cut, trim or edge. Do not run the engine at  
high speed when not cutting.  
• Avoid creating a source of ignition for spilled fuel. Do  
not start the engine until fuel vapors dissipate.  
• Always stop the engine when cutting is delayed or  
when walking from one cutting location to another.  
• Move the unit at least 30 feet (9.1 m) from the fueling  
source and site before starting the engine. Do not  
smoke, keep sparks and open flames from the area  
while adding fuel or operating the unit.  
• If you strike or become entangled with a foreign  
object, stop the engine immediately and check for  
damage. Do not operate before repairing damage.  
Do not operate the unit with loose or damaged parts.  
WHILE OPERATING  
• Never start or run the unit inside a closed room or  
building. Breathing exhaust fumes can kill. Operate  
this unit only in a well ventilated area outdoors.  
• Stop and switch the engine to off for maintenance,  
repair, or for changing the cutting attachment or  
other attachments.  
• Wear safety glasses or goggles that are marked as  
meeting ANSI Z87.1 standards, and ear/hearing pro-  
tection when operating this unit. Wear a face or dust  
mask if the operation is dusty.  
• Use only genuine manufacturer’s replacement parts  
and accessories for this unit. These are available  
from your authorized service dealer. Use of any parts  
or accessories not authorized by the manufacturer  
could lead to serious injury to the user, or damage to  
the unit, and void your warranty.  
• Wear heavy, long pants, boots, gloves and a long  
sleeve shirt. Do not wear loose clothing, jewelry,  
short pants, sandals or go barefoot. Secure hair  
above shoulder level.  
• Keep unit clean of vegetation and other materials.  
They may become lodged between the cutting  
attachment and shield.  
• The cutting attachment shield must always be in  
place while operating the unit. Do not operate unit  
without both trimming lines extended, and the proper  
line installed. Do not extend the trimming line beyond  
the length of the shield.  
To reduce fire hazard, replace faulty muffler and  
spark arrestor, keep the engine and muffler free from  
grass, leaves, excessive grease or carbon build up.  
OTHER SAFETY WARNINGS  
• Never store the unit, with fuel in the tank, inside a  
building where fumes may reach an open flame or  
spark.  
• This unit has a clutch. The cutting attachment  
remains stationary when the engine is idling. If it  
does not, have the unit adjusted by an authorized  
service technician.  
• Allow the engine to cool before storing or transport-  
ing. Be sure to secure the unit while transporting.  
• Adjust the D-Handle to your size to provide the best  
grip.  
• Store the unit in a dry area, locked up or up high  
to prevent unauthorized use or damage, out of the  
reach of children.  
• Be sure the cutting attachment is not in contact with  
anything before starting the unit.  
• Use the unit only in daylight or good artificial light.  
• Never douse or squirt the unit with water or any other  
liquid. Keep handles dry, clean and free from debris.  
Clean after each use, see Cleaning and Storage  
instructions.  
• Avoid accidental starting. Be in the starting position  
whenever pulling the starter rope. The operator and  
unit must be in a stable position while starting. See  
Section 5, Operation.  
• Keep these instructions. Refer to them often and use  
them to instruct other users. If you loan someone this  
unit, also loan them these instructions.  
• Use the right tool. Only use this tool for the purpose  
intended.  
• Do not overreach. Always keep proper footing and  
balance.  
SAVE THESE INSTRUCTIONS  
5
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Safety (continued)  
SAFETY AND INTERNATIONAL SYMBOLS  
This operator's manual describes safety and international symbols and pictographs that may appear on this product.  
Read the operator's manual for complete safety, assembly, operating and maintenance and repair information.  
SYMBOL  
MEANING  
• SAFETY ALERT SYMBOL  
Indicates danger, warning, or caution. May be used in conjunction with other  
symbols or pictographs.  
• WARNING - READ OPERATOR'S MANUAL  
Read the Operator’s Manual(s) and follow all warnings and safety instructions.  
Failure to do so can result in serious injury to the operator and/or bystanders.  
• FOR SERVICE INFORMATION, CALL:  
USA: 1-800-345-8746  
CANADA: 1-800-668-1238  
• WEAR EYE AND HEARING PROTECTION  
WARNING: Thrown objects and loud noise can cause severe eye injury and hearing  
loss. Wear eye protection meeting ANSI Z87.1 standards and ear protection when  
operating this unit.  
• KEEP BYSTANDERS AWAY  
WARNING: Keep all bystanders, especially children and pets, at least 50 feet (15 m)  
from the operating area.  
• PRIMER BULB  
Push primer bulb, fully and slowly, 5 to 7 times.  
• UNLEADED FUEL  
Always use clean, fresh unleaded fuel.  
• OIL  
Refer to operator's manual for the proper type of oil.  
• THROWN OBJECTS AND ROTATING CUTTER CAN CAUSE SEVERE INJURY  
WARNING: Do not operate without the cutting attachment shield in place.  
Keep away from the rotating cutting attachment.  
6
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Safety (continued)  
SYMBOL  
MEANING  
• ON/OFF STOP CONTROL  
ON / START / RUN  
• ON/OFF STOP CONTROL  
OFF OR STOP  
• HOT SURFACE WARNING  
Do not touch a hot muffler, gear housing or cylinder. You may get burned. These parts  
get extremely hot from operation. When turned off they remain hot for a short time.  
• SHARP BLADE  
WARNING: Sharp blade on cutting attachment shield. To prevent serious injury, do not  
touch line cutting blade.  
• CHOKE CONTROL  
A • START position.  
B • RUN position.  
• DO NOT USE BLADES  
WARNING: To prevent serious personal injury, do not attach or operate the  
unit with any type of blade.  
WARNING: The operation of any power tool can cause foreign objects to be thrown  
into your eyes. This can lead to severe eye damage. Before commencing power tool  
operation, always wear safety glasses or goggles that are marked as meeting ANSI  
Z87.1 standards, and a full face shield when needed.  
7
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Section 2  
Know Your Unit  
APPLICATIONS  
As a trimmer;  
Cutting grass and light weeds.  
Edging  
Decorative trimming around trees, fences, etc.  
Spark Plug  
Starter Rope Grip  
Gas Cap  
Shaft Grip  
Air Filter Cover  
Throttle Control  
On/Off Stop Control  
D-Handle  
Shaft Housing  
Choke Lever  
Primer Bulb  
Cutting Attachment  
Line Cutting Blade  
Cutting Attachment Shield  
8
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Section 3  
Assembly  
(4) Screws  
(4) Screws  
Shaft Grip  
Shaft  
Housing  
Fig. 3-4  
Minimum 6 inches  
(15.24 cm)  
On some units, the D-handle may be preinstalled and  
only require loosening the screws and adjusting the  
D-handle to the operator. Go to step 4 for adjusting the  
D-handle if preinstalled.  
D-Handle  
Bottom Clamp  
INSTALLING AND ADJUSTING THE D-HANDLE  
1. Remove the screws, nuts and bottom clamp piece  
that were installed on the D-handle for shipping.  
(4) Nuts  
Fig. 3-1  
2. Place D-handle the over the shaft housing and onto  
the bottom clamp (Fig. 3-1). Place it a minimum of  
6 inches (15.24 cm) from the end of the shaft grip.  
3. Hold each hex nut in the bottom clamp recess with  
a finger. Start screws with a large Phillips screw-  
driver. Do not tighten until you make the handle  
adjustment.  
4. If it was preinstalled, loosen the screws on the  
D-handle just enough to move the D-handle.  
5. While holding the unit in the operating position  
(Fig. 3-2), position the D-handle to the location  
that provides you the best grip.  
6. Tighten the clamp screws evenly, until the D-handle  
is secure.  
INSTALLING THE CUTTING ATTACHMENT  
SHIELD  
Fig. 3-2  
Use the following instructions if the cutting attachment  
shield on your unit is not installed.  
Shaft Housing  
Never operate the trimmer without the cutting  
attachment shield in place to prevent serious  
personal injury.  
1. Place the cutting attachment shield onto the shaft  
housing above the clamp assembly (Fig. 3-3).  
Clamp  
2. Push the cutting attachment shield down to the top  
of the cutting attachment assembly and then rotate  
the cutting attachment shield until the screw holes  
align and the guard fits into the recessed pocket  
(Fig. 3-3).  
Cutting Attachment  
Shield  
Cutting Attachment  
Fig. 3-3  
3. Install the four (4) screws with a Phillips screwdriver  
(Fig. 3-4).  
9
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Section 4  
Oil and Fuel  
If unavailable, use a good 2-cycle oil designed for  
air-cooled engines along with a fuel additive, such as  
STA-BIL® Gas Stabilizer or an equivalent. Add 0.8 oz.  
(23 ml) of fuel additive per gallon of fuel according to  
the instructions on the container. NEVER add fuel addi-  
tives directly to the unit's fuel tank.  
+
For proper engine operation and maximum relia-  
bility, pay strict attention to the oil and fuel mix-  
ing instructions on the 2-cycle oil container.  
Using improperly mixed fuel can severely dam-  
age the engine.  
UNLEADED GAS  
TROY-BILT 2 CYCLE OIL  
1 US. GALLON  
(3.8 LITERS)  
+
4.0 FL. OZ.  
(118 ml)  
Thoroughly mix the proper ratio of 2-cycle engine oil  
with unleaded gasoline in a separate fuel can. Use a  
32:1 fuel/oil ratio. Do not mix them directly in the  
engine fuel tank. See Figure 4-1 for specific gas and oil  
mixing ratios.  
MIXING RATIO - 32:1  
Fig. 4-1  
Oil and Gas Mixing Instructions  
NOTE: One gallon (3.8 liters) of unleaded gasoline  
mixed with one 4 oz. (118 ml) bottle of TROY-BILT  
2-CYCLE OIL makes a 32:1 fuel/oil ratio.  
Old and/or improperly mixed fuel are the main  
reasons for the unit not running properly. Be sure to  
use fresh, clean unleaded fuel. Follow the instructions  
carefully for the proper fuel/oil mixture.  
Definition of Blended Fuels  
Gasoline is extremely flammable. Ignited Vapors  
may explode. Always stop the engine and allow it  
to cool before filling the fuel tank. Do not smoke  
while filling the tank. Keep sparks and open  
flames at a distance from the area.  
Today's fuels are often a blend of gasoline and  
oxygenates such as ethanol, methanol or MTBE (ether).  
Alcohol-blended fuel absorbs water. As little as 1%  
water in the fuel can make fuel and oil separate. It  
forms acids when stored. When using alcohol-blended  
fuel, use fresh fuel (less than 60 days old).  
Remove fuel cap slowly to avoid injury from fuel  
spray. Never operate the unit without the fuel cap  
securely in place.  
Using Blended Fuels  
If you choose to use a blended fuel, or its use is  
unavoidable, follow recommended precautions.  
• Always use fresh fuel mix per your operator's manu-  
al.  
• Always agitate the fuel mix before fueling the unit.  
Add fuel in a clean, well ventilated area outdoors.  
Wipe up any spilled fuel immediately. Avoid creat-  
ing a source of ignition for spilt fuel. Do not start  
the engine until fuel vapors dissipate.  
• Drain the tank and run the engine dry before storing  
the unit.  
Using Fuel Additives  
The bottle of TROY-BILT 2-Cycle oil that came with  
your unit contains a fuel additive which will help inhibit  
corrosion and minimize the formation of gum  
deposits.It is recommended that you use only  
TROY-BILT 2-Cycle oil with this unit.  
NOTE: Dispose of the old fuel/oil mix in accordance to  
Federal, State, and Local regulations.  
10  
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Section 5  
Operation  
Avoid accidental starting. Be in the starting  
position whenever pulling the starting rope. To  
avoid serious personal injury, the operator and  
unit must be in a stable position while starting.  
Start/  
On (I)  
STARTING INSTRUCTIONS  
1. Mix gas with oil. Fill fuel tank with fuel/oil mixture.  
See Section 4, Oil and Fuel.  
Stop/  
Off (O)  
On/Off Stop Control  
2. Put the On/Off Stop Control in the START (I)  
Fig. 5-1  
position (Fig. 5-1).  
3. Fully press and release primer bulb slowly 5 to 7  
times. Fuel should be felt and visible in the bulb  
(Fig. 5-2). If fuel hasn’t entered the bulb, press  
three more times, or until it does.  
4. Place the choke lever in the START (A) position  
(Fig. 5-2).  
Choke Lever  
5. With the unit on the ground, squeeze the throttle  
control and hold. Pull starter rope briskly (Fig. 5-3).  
Continue pulling until the engine sounds as though  
it wants to run (normally 2 to 5 pulls).  
Run (B)  
Start (A)  
NOTE: Squeeze the throttle control until the engine  
has started and warmed up.  
Primer Bulb  
Fig. 5-2  
6. Place the choke lever in the RUN (B) position  
(Fig. 5-2).  
7. Pull starter rope briskly 1 to 3 times to start the  
engine (Fig. 5-3).  
8. If the engine does not start, repeat steps  
4 through 7.  
NOTE: If the engine floods while trying to start,  
place the choke lever in the RUN (B) position.  
Squeeze the throttle control. Pull the starter rope  
briskly. The engine should start within three (3) to  
eight (8) pulls.  
Starter Rope  
9. Squeeze the throttle control to warm up engine for  
5 to 10 seconds. Place the choke lever in the RUN  
(B) position (Fig. 5-2).  
NOTE: Choking is unnecessary when starting a  
warm engine. Put the On/Off Stop Control in the  
START (I) position (Fig. 5-1), and the choke lever in  
the RUN (B) position (Fig. 5-2).  
Throttle Control  
Fig. 5-3  
STOPPING INSTRUCTIONS  
STARTING INSTRUCTIONS  
1. Release your hand from the throttle control  
(Fig. 5-3). Allow the engine to idle.  
2. To stop the engine, put the On/Off Stop Control in  
the STOP [ ] position (Fig. 5-1).  
O
Operate this unit only in a well ventilated area  
outdoors. Carbon monoxide exhaust fumes can  
be lethal in a confined area.  
11  
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Operation (continued)  
Do not remove or alter the line cutting blade  
assembly. Excessive line length will make the  
clutch overheat. This may lead to serious person-  
al injury or damage to the unit.  
Some line breakage will occur from:  
Entanglement with foreign matter  
Normal line fatigue  
Attempting to cut thick, stalky weeds  
Forcing the line into objects such as walls or fence  
posts  
TIPS FOR BEST TRIMMING RESULTS  
Keep the cutting attachment parallel to the ground.  
Fig. 5-4  
Do not force the cutting attachment. Allow the tip  
of the line to do the cutting, especially along walls.  
Cutting with more than the tip will reduce cutting  
efficiency and may overload the engine.  
HOLDING THE TRIMMER  
Cut grass over 8 inches (200 mm) by working from  
top to bottom in small increments to avoid prema-  
ture line wear or engine drag.  
Always wear eye, hearing, foot and body protec-  
tion to reduce the risk of injury when operating  
this unit.  
Cut from left to right whenever possible. Cutting to  
the right improves the unit's cutting efficiency.  
Clippings are thrown away from the operator.  
Slowly move the trimmer into and out of the cutting  
area at the desired height. Move either in a for-  
ward-backward or side-to-side motion. Cutting  
shorter lengths produces the best results.  
Before operating the unit, stand in the operating posi-  
tion (Fig. 5-4). Check for the following:  
The operator is wearing eye protection and proper  
clothing.  
Trim only when grass and weeds are dry.  
The right arm is slightly bent, and the hand is hold-  
ing the shaft grip.  
The life of your cutting line is dependent upon;  
Following the previous trimming techniques  
What vegetation is being cut  
Where it’s being cut  
The left arm is straight, and the hand is holding the  
D-handle.  
The unit is at waist level.  
For example, the line will wear faster when trimming  
against a foundation wall as opposed to trimming  
around a tree.  
The cutting attachment is parallel to the ground and  
easily contacts the vegetation to be cut without the  
operator having to bend over.  
ADJUSTING TRIMMING LINE LENGTH  
The AFS™ cutting attachment (Automatic Feed  
System) automatically feeds out cutting line as needed.  
A blade on the cutting attachment shield will cut the  
line to the proper length if excess line is released.  
NOTE: If the lines stops feeding, this is usually a  
sign that the cutting attachment requires new line.  
See Section 6, Maintenace, Line Installation.  
NOTE: Do not rest the AFS cutting attachment on  
the ground while the unit is running .  
12  
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Operation (continued)  
DECORATIVE TRIMMING  
Decorative trimming is accomplished by removing all  
vegetation around trees, posts, fences, etc.  
Rotate the whole unit so that the cutting attachment is  
at a 30° angle to the ground (Fig. 5-5).  
Fig. 5-5  
Section 6  
MAINTENANCE  
NOTE: Some maintenance procedures may require  
special tools or skills. If you are unsure about these  
procedures take your unit to an authorized service  
dealer.  
To prevent serious injury, never do maintenance  
or repairs with unit running. Always do mainte-  
nance and repairs on a cool unit. Disconnect  
spark plug wire to ensure the unit will not start.  
MAINTENANCE SCHEDULE  
These required maintenance procedures should be  
performed at the frequency stated in the table. They  
should also be included as part of any seasonal tune-  
up.  
WHEN  
MAINTENANCE NEEDED  
GO TO:  
Page 10  
Page 16  
Page 17  
Before Starting Engine  
Every 10 Hours  
Fill fuel tank with correct oil and fuel mixture.  
Clean and re-oil air filter.  
Every 50 Hours  
Check spark plug condition and gap  
13  
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Maintenance (continued)  
LINE INSTALLATION  
This section covers both Membrane line and standard  
single line installation.  
Always use manufacturer’s 0.080 inch (2.03 mm)  
replacement line. Line other than specified may make  
the engine overheat or fail.  
Tab  
Never use metal-reinforced line, wire, chain, or  
rope, etc. These can break off and become a  
dangerous projectile.  
PRESS TABS  
TO REMOVE  
There are two methods to replace the trimming line.  
• Wind the inner reel with new line  
• Install a prewound inner reel  
Fig. 6-1  
Outer Spool  
Inner Reel  
Winding the Existing Inner Reel  
1. Press the tabs in and remove the bottom cover  
(Fig. 6-1).  
Bottom Cover  
2. Remove the inner reel from the outer spool  
(Fig. 6-2).  
3. Use a clean cloth to clean the inner reel.  
4. Check the pawl for cracking or pin wear (Fig. 6-3).  
5. If the pawl shows any sign of cracking or has  
excessive pin wear, then replace the pawl. See  
Section 6, Maintenace, Pawl Replacement.  
Pawl  
Single Line Installation  
Go To Step 9 for Membrane Line Installation  
6. Take two equal lengths of approximately 10 feet  
Fig. 6-2  
(3 m) of new trimming line.  
7. Holding the two pieces together with the ends  
even,insert the lines into the slotted hole in the  
inner reel (Fig. 6-4). Only about 1/2 inch of line will  
fit in hole. Do not force line in hole.  
NOTE: Take care when starting to wind the line as  
not to pull either piece out of the slotted hole.  
Pin  
Pawl  
8. Wind the lines in tight even layers, onto the inner  
reel (Fig. 6-5). Wind the line in the direction indicat-  
ed on the inner reel. Place your index finger  
between the two lines to stop the lines from over-  
lapping. Do not overlap the ends of the line.  
Proceed to step 11.  
Cracking  
Pin Wear  
Membrane Line Installation  
9. Take approximately 10 feet (3 m) of new trimming  
line. Insert one end of the line into the slotted hole  
in the inner reel (Fig. 6-4). Only about 1/2 inch of  
line will fit in hole. Do not force line in hole.  
Fig. 6-3  
10. Before winding, split the other end of the line back  
about 6 inches.  
11. Wind the line in tight even layers in the direction  
indicated on the inner reel. Do not twist the line  
while winding.  
NOTE: Failure to wind the line in the direction indi-  
cated will cause the cutting line not to advance.  
14  
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Maintenance (continued)  
12. Insert the ends of the line into the two holding slots  
(Fig. 6-6). Leave about 4 inches (102 mm) of line  
beyond the holding slots.  
Slotted  
Hole  
13. Insert the ends of the line through the eyelets in the  
outer spool and place inner reel inside the outer  
spool (Fig. 6-7).  
14. While holding the inner reel and outer spool, grasp  
the ends and pull firmly to release the line from the  
holding slots in the inner reel.  
15. Push the bottom cover into the outer spool until it  
snaps into place  
Fig. 6-4  
INSTALLING A PREWOUND REEL  
1. Press the tabs in and remove the bottom cover  
(Fig. 6-1).  
2. Remove the old inner reel from the outer spool  
(Fig. 6-1).  
3. Take the prewound inner reel and Insert the ends of  
the line through the eyelets in the outer spool  
(Fig. 6-7).  
4. While holding the inner reel and outer spool, grasp  
the ends and pull firmly to release the line from the  
holding slots in the inner reel.  
Fig. 6-5  
5. Push the bottom cover into the outer spool until it  
snaps into place  
Replacement Parts:  
See Accessories / Replacement Parts on page 18.  
Holding  
Slot  
PAWL REPLACEMENT  
If the pawl in the cutting attachment requires replace-  
ment due to cracking or wear, use the following  
instructions.  
Holding  
Slot  
1. Position the pawl so that it is hooked by the spring  
(Fig. 6-8).  
2. Position a medium sized flat bladed screwdriver  
through the tab hole in the outer spool and under the  
pawl as shown in figure 6-8. The end of the screw-  
driver needs to be right next to the pawl shaft.  
Fig. 6-6  
3. Turn the screwdriver to remove the pawl from it’s  
retaining hole in the outer spool.  
4. Replace with a new pawl. Press the pawl in firmly  
until it snaps into place.  
Pawl Shaft  
Eyelet  
Position Pawl  
Tab Hole  
Eyelet  
Fig. 6-7  
Screwdriver  
Fig. 6-8  
15  
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Maintenance (continued)  
AIR FILTER MAINTENANCE  
Cleaning the Air Filter  
Carburetor/ Air  
Filter Cover  
To avoid serious personal injury, always turn your  
trimmer off and allow it to cool before you clean  
or do any maintenance on it.  
Tab  
Clean and re-oil the air filter every 10 hours of opera-  
tion. It is an important item to maintain. Not maintain-  
ing the air filter will VOID the warranty.  
1. Remove the carburetor/air filter cover by pushing  
on the tab on top of the cover (Fig. 6-9).  
Fig. 6-9  
2. Remove the air filter (Fig. 6-10).  
3. Wash the filter in detergent and water. Rinse the  
filter thoroughly and allow it to dry.  
4. Apply enough clean SAE 30 motor oil to lightly coat  
the filter (Fig. 6-11).  
5. Squeeze the filter to spread and remove excess oil  
(Fig. 6-11).  
6. Reinstall the filter (Fig. 6-10) and air filter cover  
(Fig. 6-9).  
Air Filter  
NOTE: If the unit is operated without the air filter,  
you will VOID the warranty.  
Fig. 6-10  
CARBURETOR ADJUSTMENT  
The idle speed of the engine is adjustable by the screw  
next to the air filter cover (Fig 6-12).  
NOTE: Careless adjustments can seriously damage  
your unit. An authorized service dealer should make  
carburetor adjustments.  
Check Fuel Mixture  
Old and/or improperly mixed fuel is usually the reason  
for the unit not running properly. Drain and refill the  
tank with fresh, properly mixed fuel prior to making any  
adjustments. See Section 5, Oil and Fuel.  
Clean Air Filter  
The condition of the air filter is important to the opera-  
tion of the unit. A dirty air filter will restrict air flow and  
change the air/fuel mixture. This is often mistaken for  
an out of adjustment carburetor. Check the condition of  
the air filter before adjusting the idle speed screw. See  
Section 6, Maintenance.  
Fig. 6-11  
Idle Speed Screw  
Adjust Idle Speed Screw  
The cutting attachment may be spinning during  
idle speed adjustment. Wear protective clothing  
and observe all safety instructions to prevent  
serious personal injury.  
Fig. 6-12  
16  
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Maintenance (continued)  
If after checking the fuel mixture and cleaning the air  
filter the engine still will not idle, adjust the idle speed  
screw as follows.  
1. Start the engine and let it run at a high idle for a  
minute to warm up.  
REPLACING THE SPARK PLUG  
Use a Champion RCJ6Y spark plug (or equivalent). The  
correct air gap is 0.025 inch (0.655 mm). Remove the  
plug after every 50 hours of operation and check its  
condition.  
2. Release the throttle trigger and let the engine idle. If  
the engine stops, insert a small phillips or flat blade  
screwdriver into the screw next to the air filter  
cover (Fig. 6-12). Turn the idle speed screw in,  
clockwise, 1/8 of a turn at a time (as needed) until  
the engine idles smoothly.  
1. Stop the engine and allow it to cool. Grasp the plug  
wire firmly and pull the cap from the spark plug.  
2. Clean dirt from around the spark plug. Remove the  
spark plug from the cylinder head by turning a 5/8  
inch socket counterclockwise.  
3. Replace cracked, fouled or dirty spark plug. Set the  
air gap at 0.025 inch (0.655 mm) using a feeler  
gauge (Fig. 6-13).  
NOTE: The cutting attachment should not rotate  
when the engine idles.  
3. If the cutting attachment rotates when the engine  
idles, turn the idle speed screw counterclockwise  
1/8 of a turn at a time (as needed), to reduce idle  
speed.  
Do not sand blast, scrape, or clean electrodes.  
Grit in the engine could damage the cylinder.  
Checking the fuel mixture, cleaning the air filter, and  
adjusting the idle speed screw should solve most  
engine problems.  
4. Install a correctly gaped spark plug in the cylinder  
head. Tighten by turning the 5/8 inch socket clock-  
wise until snug.  
If not and:  
The engine will not idle,  
If using a torque wrench torque to;  
110-120 in.•lb. (12.3-13.5 N•m).  
Do not over tighten.  
The engine hesitates or stalls on acceleration,  
There is a loss of engine power,  
have the carburetor adjusted by an  
authorized service dealer.  
0.025 inch  
(0.655 mm)  
Fig. 6-13  
17  
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Maintenance (continued)  
ACCESSORIES/REPLACEMENT PARTS  
LONG TERM STORAGE  
If the unit will be stored for an extended time,  
Spark Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181765  
Spark Arrestor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182153  
Replacement Line Cartridge . . . . . . . . . . . . . . . . 49U0333L063  
Fuel Cap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180000  
Shoulder Harness . . . . . . . . . . . . . . . . . . . . . . . . . . . . 682075  
1. Drain all fuel from the gas tank into a container. Do  
not use fuel that has been stored for more than 60  
days. Dispose of the old fuel in accordance to  
Federal, State, and Local regulations.  
2. Start the engine and allow it to run until it stalls.  
This ensures that all gasoline has been drained  
from the carburetor.  
These replacement parts can be purchased from your  
local authorized dealer.  
3. Allow the engine to cool. Remove the spark plug  
and put 1 oz. (30 ml) of high quality motor oil into  
the cylinder. Pull the starter rope slowly to distrib-  
ute the oil. Reinstall the spark plug.  
CLEANING  
NOTE: Remove the spark plug and drain all of the  
oil from the cylinder before attempting to start the  
trimmer after storage.  
To avoid serious personal injury, always turn your  
trimmer off and allow it to cool before you clean  
or do any maintenance on it.  
4. Thoroughly clean the unit and inspect for any loose  
or damaged parts. Repair or replace damaged  
parts and tighten loose screws, nuts or bolts. The  
unit is ready for storage.  
Use a small brush to clean off the outside of the unit.  
Do not use strong detergents. Household cleaners that  
contain aromatic oils such as pine and lemon, and  
such as kerosene, can damage plastic housing or han-  
dle. Wipe off any moisture with a soft cloth.  
TRANSPORTING  
• Allow the engine to cool before transporting.  
• Secure the unit while transporting.  
• Drain the gas tank before transporting.  
• Tighten gas cap before transporting.  
STORAGE  
• Never store the unit with gasoline in the tank where  
fumes may reach an open flame or spark.  
• Allow the engine to cool before storing.  
• Store the unit locked up to prevent unauthorized use  
or damage.  
• Store the unit in a dry, well ventilated area.  
• Store the unit out of the reach of children.  
18  
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Section 7  
Troubleshooting  
ENGINE WILL NOT START  
C A U S E  
A C T I O N  
On/Off Stop Control is in STOP position  
Turn On/Off Stop Control to START  
Fill fuel tank with properly mixed fuel  
Press primer bulb fully and slowly 5-7 times  
Empty fuel tank  
Primer bulb wasn't pressed enough  
Engine flooded  
Use starting procedure with choke lever in the  
RUN position, Pg. 11  
Old or improperly mixed fuel  
Fouled spark plug  
Drain gas tank / Add fresh fuel mixture  
Replace or clean the spark plug  
ENGINE WILL NOT IDLE  
C A U S E  
A C T I O N  
Air Filter is Plugged  
Replace or clean the air filter  
Drain gas tank / Add fresh fuel mixture  
Adjust per instruction Pg. 16  
Old or improperly mixed fuel  
Improper carburetor adjustment  
ENGINE WILL NOT ACCELERATE  
C A U S E  
A C T I O N  
Old or improperly mixed fuel  
Drain gas tank / Add fresh fuel mixture  
Improper carburetor adjustment  
Take to an authorized service dealer for  
carburetor adjustment  
Cutting attachment bound with grass  
Dirty air filter  
Stop the engine and clean the cutting attachment  
Clean or replace the air filter  
ENGINE LACKS POWER OR STALLS WHEN CUTTING  
C A U S E  
A C T I O N  
Old or improperly mixed fuel  
Drain gas tank / Add fresh fuel mixture  
Improper carburetor adjustment  
Take to an authorized service dealer for  
carburetor adjustment  
CUTTING ATTACHMENT WILL NOT ADVANCE LINE  
C A U S E  
A C T I O N  
Cutting attachment bound with grass  
Cutting attachment out of line  
Inner reel bound up  
Stop the engine and clean cutting attachment  
Refill with new line  
Replace the inner reel  
Cutting head dirty  
Clean inner reel and outer spool  
Line welded  
Disassemble, remove the welded section  
and rewind the line  
Line twisted when refilled  
Disassemble and rewind the line  
CUTTING LINE ADVANCES UNCONTROLLABLY  
C A U S E  
A C T I O N  
Pawl in cutting attachment is worn or broken  
Disassemble and check pawl, replace if needed  
19  
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Section 8  
Specifications  
ENGINE  
Engine Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air-Cooled, 2-Cycle  
Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.37 cu. in. (22.5 cc)  
Clutch Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Centrifugal  
Idle Speed RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,600-3,600 rpm  
Operating RPM (Trimmer( . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7,700-8,600 rpm  
Ignition Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electronic  
On/Off Stop Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Toggle Switch  
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel/Oil Mixture  
Fuel/Oil Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32:1  
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unleaded  
Carburetor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diaphragm, All-Position  
Starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auto Rewind  
Muffler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Baffled with Guard  
Throttle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Manual Spring Return  
Fuel Tank Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 oz (591 ml)  
DRIVE SHAFT & CUTTING ATTACHMENT  
Drive Shaft Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Aluminum Tube  
Throttle Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Finger-Tip Trigger  
Unit Weight (No Fuel, with D-handle, Cutting attachment shield and Cutting attachment) . . . . . . . . . . . 9.3 lbs (4.22 kg)  
Cutting Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AFS™ Dual String Cutting Head  
Line Spool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Automatic Line Feed Releaser  
Line Spool Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 inches (76.2 mm)  
Trimming Line Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.080 inches (2.03 mm)  
Cutting Path Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 inches (38.1 cm)  
20  
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Notes  
21  
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MANUFACTURER’S LIMITED WARRANTY FOR:  
The limited warranty set forth below is given by MTD  
No implied warranty, including any implied warranty of  
merchantability or fitness for a particular purpose,  
applies after the applicable period of express written  
warranty above as to the parts as identified. No other  
express warranty or guaranty, whether written or oral,  
except as mentioned above, given by any person or  
entity, including a dealer or retailer, with respect to any  
product shall bind MTD. During the period of the  
Warranty, the exclusive remedy is repair or replacement  
of the product as set forth above. (Some states do not  
allow limitations on how long an implied warranty lasts, so  
the above limitation may not apply to you.)  
SOUTHWEST INC (“MTD”) with respect with new  
merchandise purchased and used in the United States, its  
possessions and territories.  
MTD warrants this product against defects in material and  
workmanship for a period of two (2) years commencing on  
the date of original purchase and will, at its option, repair or  
replace, free of charge, any part found to be defective in  
material or workmanship. This limited warranty shall only  
apply if this product has been operated and maintained in  
accordance with the Operator’s Manual furnished with the  
product, and has not been subject to misuse, abuse,  
commercial use, neglect, accident, improper maintenance,  
alteration, vandalism, theft, fire, water or damage because  
of other peril or natural disaster. Damage resulting from the  
installation or use of any accessory or attachment not  
approved by MTD for use with the product(s) covered by  
this manual will void your warranty as to any resulting dam-  
age. This warranty is limited to ninety (90) days from the  
date of original retail purchase for any MTD product that is  
used for rental or commercial purposes, or any other  
income-producing purpose.  
The provisions as set forth in this Warranty provide the  
sole and exclusive remedy arising from the sales. MTD  
shall not be liable for incidental or consequential loss or  
damages including, without limitation, expenses  
incurred for substitute or replacement lawn care servic-  
es, for transportation or for related expenses, or for  
rental expenses to temporarily replace a warranted  
product. (Some states do not allow limitations on how long  
an implied warranty lasts, so the above limitation may not  
apply to you.)  
HOW TO OBTAIN SERVICE: Warranty service is available,  
WITH PROOF OF PURCHASE THROUGH YOUR LOCAL  
AUTHORIZED SERVICE DEALER. To locate the dealer in  
your area, please check for a listing in the Yellow Pages or  
contact the Customer Service Department of MTD SOUTH-  
WEST INC by calling 1-800-345-8746 or writing to 550 N.  
54th Street, Chandler, Arizona 85226 or if in Canada call  
1-800-668-1238. No product returned directly to the facto-  
ry will be accepted unless prior written permission has been  
extended by the Customer Service Department of MTD  
SOUTHWEST INC.  
In no event shall recovery of any kind be greater than the  
amount of the purchase price of the product sold. Alteration  
of the safety features of the product shall void this Warranty.  
You assume the risk and liability for loss, damage, or injury  
to you and your property and/or to others and their  
property arising out of the use or misuse or inability to use  
the product.  
This limited warranty shall not extend to anyone other than  
the original purchaser, original lessee or the person for  
whom it was purchased as a gift.  
How State Law Relates to this Warranty: This warranty  
gives you specific legal rights, and you may also have other  
rights which vary from state to state.  
This limited warranty does not provide coverage in the  
following cases:  
A. Tune-ups - Spark Plugs, Carburetor Adjustments,  
Filters  
To locate your nearest service dealer dial  
1-800-345-8746 in the United States or  
1-800-668-1238 in Canada.  
B. Wear items - Bump Knobs, Outer Spools, Cutting  
Line, Inner Reels, Starter Pulley,Starter Ropes, Drive  
Belts  
C. MTD does not extend any warranty for products sold  
or exported outside of the United States of America,  
its possessions and territories, except those sold  
through MTD’s authorized channels of export distri-  
bution.  
MTD Southwest Inc  
550 N. 54th Street  
Chandler, AZ 85226 U.S.A.  
MTD reserves the right to change or improve the design of  
any TROY-BILT Product without assuming any obligation to  
modify any product previously manufactured.  
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