Echo Trimmer SRM 3800 TYPE1 E User Manual

T R IM M E R /  
B R U S H C U T T E R  
S R M -3 8 0 0  
T Y P E 1 -E  
898696-43132  
X750226-3801  
1
847  
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RULES FOR SAFE OPERATION  
WARNING  
DANGER  
SAFETY INSTRUCTIONS  
1. Do Not operate the unit when you are  
1. Do Not smoke while handling gasoline.  
2. Do Not refuel a hot engine.Wait unit it cools.  
3. Do Not overfill the tank. Spiled fuel must be wiped  
up.  
fatigued.  
2. Do Not operate if other people or animals  
are in the work area.  
4. Always stop the engine when refueling.  
5. Always remove the fuel cap slowly in order to  
relieve any pressure build up in the tank.  
6. Always restart the engine at least 3 m (10 feet)  
away from the refueling posint.  
3. Do Not operate the unit without the shield  
correctly in position.  
4. Do Not operate in a confined area. Carbon  
monoxide exhaust gas is highly poisonous.  
5. Do Not operate the unit while you are smoking.  
6. Always wear eye protection goggles when  
operating the unit.  
7. Always store gasoline in an approved container.  
7. Always hold the unit firmly with both hands and  
with fingers and thumbs encircling the handles.  
8. Always obey local ordinances regulating the  
use of internal combustion engines in your area.  
9. Always use the cutting attachments as  
approved and supplied by ECHO Inc. for your  
unit.  
10. Always remain alert when operating the unit  
to avoid possible injury to yourself and other  
people.  
11. Always wear the shoulder harness when  
operating the unit.  
12. Do not operate the unit while under the  
influences of drugs or alcohol.  
ATTENTION  
WARNING  
DANGER  
For your protection when operating this unit, comly  
with all Safety Rules as listed in the Operator’s  
Manual. (Replacement manuals are available from  
your ECHO dealer.)  
SERIOUS INJURY MAY RESULT FROMTHE  
IMPROPER USE OF STEEL BLADES.  
COMPLYWITH ALL SAFETY INSTRUCTIONS  
LISTED INTHE OPERATOR’S MANUAL AND  
SUPPLIEDWITHTHE BLADES.  
1. Do not operate unless the debris shield and  
safety harness are in good condition and  
properly installed.  
2. Do not operate if other persons or animals are  
in the work area.  
1.THE ECHO SAWTOOTH BLADE IS  
DESIGNEDTO CUT BRUSH AND SMALL  
TREES.  
2.THE ECHO 8TOOTH ROTARY KNIFE BLADE  
IS DESIGNEDTO CUT HEAVYWEEDS AND  
GRASS.TO AVOID INJURY DUETO KICK  
BACK OR BLADE FRACTURE, DO NOT USE  
THIS BLADETO CUT BRUSH ORTREES.  
3. Do not operate without eye protection goggles  
available from your ECHO dealer.  
3.ECHO INC.WILL NOT BE RESPONSIBLE  
FORTHE FAILURE OF CUTTING DEVICES  
WHICH HAVE NOT BEENTESTED AND  
APPROVED BY ECHO FOR USEWITHTHIS  
UNIT.  
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NOMENCLATURE OF PARTS  
Gear housing  
Top guard  
Drive shaft assembly  
Muffler  
Ignition switch  
Spark plug  
Throttle trigger  
Shield  
Grip  
Choke knob  
Air cleaner  
cover  
Fuel tank  
Starter handle  
Shoulder harness  
TECHNICAL DATA  
SRM-3800TYPE1-E  
Dimension  
Masses  
Engine  
L × W × H  
cm (inch)  
kg (lbs)  
181.5 × 72 × 46 (71.5 × 28.4 × 18.1)  
8.0 (17.6): without shoulder harness and cutter head  
Type  
Displacement  
Air cooled two stroke single cylinder  
37.4 (2.28)  
mL (cu.inch)  
r/min  
Max revolution  
Carburetor  
Ignition  
10,000  
Walbro diaphragm typeWT  
Flywheel magneto : CDI (Capacitor Discharge Ignition)  
system  
Spark plug  
Starter  
NGK BPM7A or CHAMPION CJ-7Y  
Recoil starter  
Clutch  
Automatic centrifugal clutch  
Fuel  
Mixing ratio  
Mixture of gasoline (Unleaded, 89 octane minimum) and  
specially blended 50 : 1 ECHO two cycle engine oil.  
Tank capacity  
L (FL.OZ.US) 0.95 (32.2)  
Nylon line cutter head  
Drive shaft  
assembly  
Cutter (Option)  
Cutter  
Circular saw, 25 cm (10 inch)  
Cutter (Option)  
Gear housing  
8 cutter blade, 20 cm (8 inch)  
60 degree bevel gears, ratio 1 : 1.33 (Counter-  
clockwise)  
Lubrication  
Drive shaft  
Shield  
Shell Delpena or good quality lithium grease  
High tensile solid steel, 5 bearings  
Metal shield mounted on the gear housing for nylon line  
and metal blade applications.  
Technical data subject to change without notice.  
- 3 -  
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ASSEMBLING  
DRIVE SHAFT  
Stand engine uprignt on a level floor.  
Loosen bolts at drive shaft end of the engine.  
Fit drive shaft assembly ensuring that the drive  
shaft is correctly engaged.  
Bolts  
Tignten bolts to fasten drive shaft assembly.  
WARNING  
DANGER  
NEVER START ENGINEWITHOUT  
DRIVESHAFT ASSEMBLY INSTALLED.  
THIS COULD RESULT IN SERIOUS INJURY.  
HANDLE  
1. Right hand grip assembly  
2. Slot  
3. Right hand U-handle  
1
3
Insert right hand grip assembly into right hand U-  
handle and fit it to the slot for rotation prevention of  
right hand U-handle.  
2
Fit grip assembling bolt and secure the grip firmly.  
1
1. Grip assembling bolt  
Remove bolt retainer tube from end of handle  
assembling bolt (8 mm).  
1. Handle assembling bolt (8 mm)  
2. Bolt retainer tube  
1
2
Install handle assembling bracket (upper) in handle  
assembling bracket (lower) and fix handle by tightening  
handle assembling bolt (8 mm) lightly.  
1. Handle assembling  
1
2
bracket (upper)  
2. Handle assembling  
bolt (8 mm)  
3
3. Left handle  
4. Handle assembling  
bracket (lower)  
5. To engine  
4
5
- 4 -  
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Loosen 4 right handle assembling bolts and insert right  
hand U-handle into right handle assembling bracket.  
1. Right handle assembling bolt  
2. Right handle assembling bracket  
3. Right hand U-handle  
(toward direction of arrow  
)
1
4. To engine  
2
Fix the right hand U-handle by tightening 4 right handle  
assembling bolts lightly.  
3
4
Adjust each inclination of right and left handles to  
adequate position (easy to operate) and tighten firmly  
handle assembling bolt (8 mm) and 4 right handle  
assembling bolts.  
Determine “Easy to operate” position seeing illustration  
below.  
1
2
3
4
1. Adjustment of right handle inclination (left/right)  
2. Adjustment of right handle inclination (forward/  
backward)  
3. Adjustment of left handle inclination (forward/  
backward)  
4. To engine  
To eliminate loosening of throttle wire fix it to shaft  
tube (2 places) and to right hand U-handle (1 place)  
with wire fixing clips.  
1
1. Wire fixing clip  
2. Throttle wire  
2
1
2
1. Right hand  
U-handle  
2. Wire fixing clip  
3. Shaft tube  
4. Throttle wire  
3
4
- 5 -  
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THROTTLE CABLE  
The engine is delivered with throttle cable (engine side)  
separated, assemble the cable to carburetor as follows.  
Nut (A)  
Swivel  
Nut (B)  
Remove the cover.  
Remove nut (A) and one washer from throttle  
cable.  
Stop lead  
Insert throttle cable througn the hole of bracket  
as shown.  
Replace washer and nut (A) finger tignt, and attach  
the inner cable to swivel on throttle lever ensuring  
that the nipple fits into socket provided on one  
side of slot.  
Ground  
lead  
Tighten nut (A) to secure in this position.  
Check that throttle operates freely and returns to  
idle position.  
Do not loosen nut (B) unnecessarily, since it has  
been located properly at the factory.  
Reinstall air filter and cover.  
1
4
2
7
6
Connect stop lead and ground lead by couplers .  
3
SHIELD  
5
Fit the shield on the gear housing and tighten screws  
with washers (Seven points) as shown.  
SHOULDER HARNESS  
Fit the shoulder starp to the swivel hook, and  
adjust the length of starp and or the locaion clamps  
to maintain the cutter head parallel to the ground.  
Shoulder strap  
assembly  
Quick release  
latch  
Waist pad  
OPERATION  
GENERAL CHECK  
Eneure that all nuts, screws and bolts installed  
are properly tightened.  
Oil  
1
Gasoline  
50  
FUEL STATEMENT  
R+M  
2
GASOLINE : Use 89 octane (  
) gasoline or  
gasohol known to be good quality.Gasohol may contain  
maximum 10% ethyl (grain) alcohol or 15% MTBE  
(methyl tertiary-butyl ether).Gasohol containing methyl  
(wood) alcohol is not approved.  
OIL : ECHO brand premium two-stroke 50:1 oil is  
reguirred.  
Mix oil and gasoline /gasohol according to insturctions  
on the oil container label.  
MIXING : Follow directions on the oil container.  
- 6 -  
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Fuel mix chart  
(50 : 1)  
IMPORTANT  
Stored fuel ages. Do not mix more fuel than  
you expect to use in thirty (30) days, ninety  
(90) days when a fuel stabilizer is added.  
Stored two-stroke fuel may separata. ALWAYS  
shake fuel container thoroughly before each  
use.  
US  
METRIC  
GAS  
GAS  
OIL  
FL.OZ.  
2.6  
OIL  
mL  
80  
GAL.  
L
4
1
2
5
5.1  
8
160  
400  
12.8  
20  
STARTING COLD ENGINE  
Slide switch to START/RUN position as shown.  
Push purge bulb 3 or 4 times (or until constant  
flow of fuel is visible in fuel return line.)  
Pull choke knob up to COLD START (Close)  
position.  
Throttle trigger  
Ignition switch  
Pull recoil starter until the engine fires.Now, push  
choke knob to RUN (open) position, and if  
necessary, restart the engine again and allow to  
warm up for a few minutes before using.  
After idling, gradually open throttle and cutter blade  
will start to operate as the engine attains clutch  
engagement speed of 3,500 r/min approximately.  
Throttle  
control lockout  
NOTE  
Recoil starter : Use short pulls - only 1/2 - 2/3 of  
starter rope for starting. Do not let starter rope  
snap back in .  
Purge bulb  
Always hold the unit firmly.  
STARTINGWARM ENGINE  
When engine is warm, start it by pulling recoil  
starter rope with switch positioned at START/RUN.  
(Keep choke lever in RUN (open) position)  
If engine does not start in a few tries, follow same  
procedures as starting a cold.  
STOPPING ENGINE  
Release throttle trigger and allow to run at an idle  
speed.  
Fuel return line  
Side ignition switch to “STOP” position.  
COLD START  
(Close)  
Choke knob  
RUN  
(Open)  
HOLDTHE UNIT FIRMLY.  
- 7 -  
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OPERATINGTHETRIMMER  
Adjust handle to a convenient position for cutting  
as instructed on page 5.  
Allow the engine to warm up at a fast idle for a few  
minutes.  
Increase engine speed as necessary.  
When mowing shrubs, weeds, or grass, swing the  
cutter head from right to left as you move forward.  
-
Avoid striking any obstruction such as rocks,  
stones or tree stumps which can damage the  
cutter head .  
Do not cut into the ground.  
-
To avoid damage to the engine, do not run the  
engine unloaded at full throttle.  
In the event that the cutter strikes an obstruction  
or is otherwise prevented from rotating in normal  
operation, the clutch will slip to prevent possible  
engine damage. In this case, stop the engine, free  
the cutter and then start the operation again.  
WARNING  
DANGER  
DO NOT ALLOW EITHER PEOPLE OR  
ANIMALS INTOTHEWORK AREA.  
ALWAYSWEAR SAFETY GOGGLESWHEN  
CUTTING.  
DRESS PROPERLY - AVOID LOOSE  
CLOTHING.  
WHEN GRASS ORWEEDS HAVE CLOGGED  
THE CUTTER HEAD AFFECTING NORMAL  
OPERATION, FIRST, STOPTHE ENGINE AND  
THEN REMOVETHE DEBRIS.  
WARNING  
DANGER  
BEFORE STARTING UPTHE ENGINE, MAKE  
SURETHATTHE CUTTER BLADE IS NOT  
CONTACTING ANYTHING.  
WHENTWO OR MORE OPERATORS ARE  
WORKINGTOGETHER, ENSURETHAT A  
SAFE DISTANCE IS KEPT BETWEEN  
THEM.  
OPERATING INSTRUCTIONS (METAL  
BLADES and OPTIONAL NYLON LINE)  
Your brushcutter/trimmer, has been designed and con-  
structed to give you years of trouble-free service and  
relieve you of the many back-aching tasks normally  
associated with grass trimming, weed control and  
brushcutting. Nevertheless, in common with all other  
power operated tools, the Owner and/or Operator has  
a definite responsibility to maintain the safe working  
condition of the unit as provided by the manufacturer ,  
and to ensure also the safe operating procedures as  
prescribed by common sense and this manual. Please,  
therefore, read and understand the instructions as listed  
hereunder, and on Page 2, in order to prevent accidents  
and possible injury.  
- 8 -  
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ECHO 2-LINE MANUALTRIMMER HEAD  
(OPTION)  
WARNING  
DANGER  
GRASS/WEEDTRIMMERS CAN THROW  
GRAVEL, STONE,WOOD CHIPS, GLASS, AND  
PLASTIC OR METAL OBJECTS.THE DEBRIS  
SHIELD BEHINDTHETRIMMER HEAD STOPS  
MUCH OFTHE DEBRIS, BUT CANNOT  
PREVENTTHE OPERATOR FROM BEING  
STRUCK BY SOME DEBRIS. READTHE RULES  
FOR SAFE OPERATION INTHE OPERATOR’S  
MANUALTHATYOU RECEIVEDWITHYOUR  
ECHOTRIMMER. AISO, FOLLOW AII  
INSTRUCTIONS INTHIS INSTRUCTION SHEET.  
1. Read the Operator’s Manual carefully.Be throughly  
familiar with the controls and proper use of the  
trimmer.  
Know how to stop the unit and disengage the  
controls.  
2. Never allow children to operate the trimmer.  
3. Never allow adults to use the trimmer unless they  
have received prpper instructions. Be sure the  
operator is properly attired and wears the type of  
foot, leg, head, eye and ear protection  
recommended both in your ECHO Operator's  
Manual and by your ECHO Servicing Dealer.  
4. Always wear eye protection that conforms to  
A.N.S.I.Z87.1-1979.  
1. REPLACING LINE  
A. Remove spool by turning knob clockwise, “right”,  
15 cm (6 inch)  
1C  
1D  
1B  
and separating parts.  
B. Thread a 6 m (20 feet) length of 2.4 mm (.095 inch)  
or 2.7 mm (.105 inch) ECHO line through hole in  
spool so that ends are the same length.  
C. Wind both ends of line tightly and evenly clockwise  
(see arrows on spool), and wind from side to side  
without twisting the lines.  
D. Secure ends of line temporarily with about 15 cm  
(6 inch) extending out.  
SPOOL  
2.REPLACING SPOOL  
HOUSING  
NOTE  
Keep line tight on spool.  
2B  
2A  
BOLT  
A. Snap spool into housing while pulling line through  
eyelets with about 15 cm (6 inch) extending out.  
CAUTION  
Knob tightens counterclockwise,“left”.  
SPRING  
KNOB  
B. Fasten spool to housing with shaft bolt, spring,  
and knob.  
- 9 -  
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INSTALLATION OF NYLON LINE HEAD  
(OPTION)  
Set the nylon line head to the drive shaft and tighten  
by turning as shown.  
Upper fixing plate  
Locking tool  
Cutting  
head  
TIGHTEN  
OPERATING INSTRUCTIONS nylon line  
1. Always use the end of the line for cutting. Forcing  
the cutter head too close to the work will result in  
reduced efficiency and broken line.  
2. Maintain the line at the recommended length of  
12.5 to 15 cm ( 5 to 6 inch ). A longer line will  
reduce engine speed, a shorter line may result in  
engine damage.  
3. The trimmer head rotates counterclockwise.  
Always cut with the head tilted to the right to deflect  
debris away from the operator.  
4. Always observe the SAFETY RULES on Page 2  
when using the unit.  
SHOULDER HARNESS  
Install the harness over the both shoulders and  
adjust shoulder straps so that the quick release  
latch rests low on the right hand side.  
Attach the trimmer/brushcutter to the harness by  
means of the quick release latch.  
Make some practice sweeps as with a trimmer  
and readjust the harness as necessary for comfort  
and to maintain the cutter parallel to the ground.  
CUTTING PROCEDURES  
WARNING  
DANGER  
IN CASE OF EMERGENCY, PULLTHE QUICK  
RELEASE LATCHTO DISCONNECTTHE  
TRIMMER FROMTHE HARNESS.  
PULL  
Quick  
release  
latch  
- 10 -  
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TRIMMING  
The nylon line will allow you to trim along walls and  
fence lines. Always try to trim from right to left, walking  
behind the unit and parallel to the wall or fence, thus  
deflecting debris away from the operator.  
EDGING  
1. The nylon line is intended only to cut grass and  
should not be used to cut a normal edging trench  
along stone or concrete driveway etc.  
2. Tilt the unit vertically as illsutrated and use only  
the line tip to remove unwanted growth.  
MOWING  
The nylon line will effectively mow large areas of  
heavy grass and/or weeds. Use the standard 12.5  
- 15 cm ( 5 - 6 inch) of line and operate at full  
throttle.  
When mowing cultivated areas such as lawns hold  
the cutter head pararell to the gound to avoid  
scalping.  
SCALPING  
1. The cleaning of weeds and grass right down to  
the earth can be accomplished very easily with  
the nylon line.  
2. Scalping around trees and brushes is particularly  
effective, but care should be exercised not to bruise  
the bark of young and sensitive growth.  
3. In flower beds, always remenber that the nylon  
line will cut in a complete circle to avoid cutting  
flowers instead of weeds.  
TREE  
SWEEPING  
1. Sweeping grass and other debris from a hard  
surface can be done very quickly.  
- 11 -  
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STEEL BLADE OPERATIONS  
Your ECHOTrimmer/Brushcutter is designed for fast,  
efficient weed and brush control in areas which are  
otherwise inaccessable to power equipment. Standard  
configuration includes a handle bar and nylon line  
head for light trimming and weed clearing.Two special  
steel blades are available as options and  
recommended for use in extended heavy weed and  
brush clearing operations :  
1.Blade: weed and grass 8 tooth 20 cm (8 inch)  
diameter  
2.Blade: brush 80 tooth 25 cm (10 inch) diameter  
WARNING  
DANGER  
1. SERIOUS INJURY MAY RESULT FROMTHE  
IMPROPER USE OF STEEL BLADES. READ  
AND COMPLYWITH SAFETY  
INSTRUCTIONS LISTED INTHIS MANUAL.  
2. THE EIGHTTOOTH BLADE IS DESIGNED  
SPECIALLYTO CUTWEED AND GRASS.TO  
AVOID INJURY DUETO KICKBACK OR  
BLADE FRACTURE, DO NOT USETHIS  
BLADETO CUT BRUSH ORTREES.  
3. ECHO INC.WILL NOT BE RESPONSIBLE  
FORTHE FAILURE OF CUTTING DEVICES  
WHICH HAVE NOT BEENTESTED AND  
APPROVED BY ECHO FOR USEWITHTHIS  
UNIT.  
WARNING  
DANGER  
SAFETY PRECAUTIONS  
1. ALWAYS USETHECORRECT BLADE FOR  
6. SHOULDTHE BRUSHCUTTER BE OPER-  
ATED FOR AN EXTENDED PERIOD OF HIGH  
TEMPERATURES,THE GEAR BOX MAY  
BECOMEVERY HOT. IFTOO HOTTOTOUCH,  
ALLOWTHE UNITTO COOL DOWN, CHECK  
THE LUBRICATION AS PER  
THE JOB AS RECOMMENDED.  
2. BE CAREFUL NOTTO HIT ROCKS, STONES,  
TREE STUMPS OR ANY FOREIGN OBJECT  
WHICH MAY DAMAGETHE BLADE.  
‘MAINTENANCEAND CONTINUETO  
OPERATE IF IN ORDER.  
3. DO NOT CUT INTOTHE GROUNDTO AVOID  
DULLINGTHE BLADE.  
7. TO AVOID ENGINE DAMAGE, DO NOT RUN  
ON FULLTHROTTLEWITHOUT LOAD.  
4. ALWAYS STOPTHE ENGINE AND EXAMINE  
THE BLADE AFTER STRIKING AN  
OBSTRUCTION. DO NOT OPERATEWITH A  
BLADEWHICH IS BLUNT, BENT,  
FRACTURED, OR DISCOLORED DUETO  
OVERHEAT.  
8. DO NOT OPERATETHE BRUSHCUTTER  
WITHOUTTHE HARNESS AND DEBRIS  
SHIELD CORRECTLY FITTED.  
9. ALWAYS INSPECTTHEWORK AREA AND  
REMOVE ANY FOREIGN OBJECTS.  
5. INTHE EVENT,THATTHE BLADE STRIKES  
AN OBSTRUCTION, OR IS OTHERWISE  
PREVENTED FROM ROTATING IN NORMAL  
OPERATION,THE CENTRIFUGAL CLUTCH  
WILL SLIPTO PREVENT ENGINE DAMAGE.  
INTHIS CASE, STOPTHE ENGINE, FREE  
AND EXAMINETHE BLADE AND IF IN  
GOOD ORDER, RESUME OPERATION.  
- 12 -  
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SHOULDER HARNESS  
Install the harness over the both shoulders and  
adjust shoulder straps so that the quick release  
latch rests low on the right hand side.  
Attach the trimmer/brushcutter to the harness by  
means of the quick release latch.  
Make some practice sweeps as with a scythe and  
readjust the harness as necessary for comfort and  
to maintain the cutter parallel to the ground.  
PULL  
Quick  
release  
latch  
WARNING  
DANGER  
IN CASE OF EMERGENCY, PULLTHE QUICK  
RELEASE LATCHTO DISCONNECTTHE  
TRIMMER FROMTHE HARNESS.  
SHIELD  
When using a metal blade. Use same as Nylon line.  
- 13 -  
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INSTALLINGTHE BLADE  
1. The installation of the 8 tooth weed/grass blade  
(option) and the 80 tooth brush is exactly the same.  
Brush Blade  
(80 tooth)  
Weed/Grass Blade  
(8 tooth)  
2. Rotate the drive shaft until the holes in the upper  
fixing plate and the gear box are aligned. Insert  
the locking tool.  
Upper fixing plate  
Locking tool  
3. Remove the nylon line line head, if fitted, by turning  
in a clockwise direction.  
Box wrench  
4. Install the blade ensuring that it is centered  
correctly on the fixing plate.  
5. Fit the lower fixing plate and tighten the locking  
nut using the box wrench supplied in the tool kit.  
TIGHTEN  
Locking tool  
6. Fit a new split pin as supplied in the tool kit to  
secure the locking nut.  
Lower fixing plate  
NOTE  
The drive shaft is fitted with left hand threads,  
therefore turn counterclockwise to tighten as  
illustrated.  
Split pin  
Always use a new split pin to secure the  
locking nut.  
Assemble cutter blade properly  
Split pin 2 × 22 mm  
Part No.898502-01130.  
Locking  
tool  
Gear housing  
Adapter  
plate (Upeer)  
Nut  
Adapter  
plate (Lower)  
Split pin  
- 14 -  
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HEAVYWEED CUTTING  
Install the 8 tooth 20 cm (8 inch) blade. (option)  
Observing all precautions as listed in this manual,  
start the engine and using full throttle, swing the  
blade in an arc as you move forward slowly. The  
cutter rotates counterclockwise and the debris will  
be pushed backwards so the work area will always  
be visible.  
BRUSHCUTTING  
Install the 80 tooth blade.  
Proceed exactly as for weed and grass cutting.  
SMALLTREES  
The unit will effectively cut small trees up to 7.5  
cm (3 inch) diameter using the 80 tooth 25 cm  
(10 inch) diameter new blade.  
Before attempting to cut, ensure that the falling  
tree will fall away from you, and if necessary, tie  
a rope to the tree and have an assistant pull it in a  
safe direction.  
Do not attempt to “plunge cut”, i.e. using the  
brushcutter like an axe. It is not necessary and  
may cause serious damage to the brushcutter.  
Brace your feet firmly on the ground and cut with  
the left hand side of the blade.  
CAUTION  
1. Always cut on full throttle.  
2. Never try cutting with a blunt blade.  
- 15 -  
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MAINTENANCE AND CARE  
- ALWAYS KEEP THE UNIT CLEAN -  
AIR FILTER  
Clean before using the unit.  
-
-
-
Remove the cover.(for air filter and carburetor)  
Take off the air filter.  
Brush off dust lightly or wash it in suitable  
cleaning fluid.  
Air filter  
Cover  
-
When you wash it in a solvent, dry it  
completely before putting back in place.  
FUEL STRAINER  
Check periodically.  
-
-
Do not allow dust to enter into fuel tank.  
Clogged strainer will cause difficulty in starting  
engine or abnormalities in engine  
performances.  
-
-
Pick up fuel strainer through fuel inlet port  
with a piece of steel wire or the like.  
When strainer is dirty, wash it in suitable  
cleaning fluid or replace it.  
Fuel strainer  
MUFFLER AND EXHAUST PORT (SAM)  
Muffler cover  
Lid  
Clean as necessary.  
Carbon deposits in cylinder exhaust port and  
muffler will reduce engine output.  
-
Muffler can be removed by taking off muffler  
cover.  
-
Be careful not to scratch cylinder or piston  
when cleaning cylinder exhaust port.  
Use non-ferrous plastic or wood.  
Check loose nuts and screws on the muffler part  
before every use.  
Screen  
Retighten them firmly if necessary.  
CYLINDER FINS  
Check periodically.  
Clogged fins will result in poor engine cooling.  
Remove dirt and dust from between fins to let  
cooling air pass easily.  
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SPARK PLUG  
Check periodically.  
Standard spark plug gap is 0.6 - 0.7 mm  
(0.024 - 0.028 in).  
Replace if either electrode is worn or if the insulator  
is fouled by oil or other deposits.  
TORQUE = 14.2 - 15.2 Nm (125 - 135 in.lb)  
0.6 - 0.7mm (.024 - .028 in.)  
CAUTION  
Do not over torque.  
GEAR HOUSING  
Gear  
housing  
Remove the bolt every 50 hours and check.  
Replenish as necessary, but do not overfill.  
-
Shell delpena or good quality lithium multi  
grease is recommendable.  
Bolt  
CARBURETOR ADJUSTMENT  
High spped needle (H)  
Low speed needle (L)  
Every unit is run at the factory and the carburetor is  
set in compliance with California Emission Regula-  
tions, In addition, the carburetor is equipped with “H”  
(High Speed Needle) and “L(Low Speed Needle) nee-  
dle adjustment limiters that prevent settings outside  
acceptable limits.  
Idle speed adjustment screw  
1. Before adjusting carburetor clean or replace air  
filter and muffler, “Spark Arrestor Screen”.  
2. Make sure the cutting attachment such as hedge  
clipper blades or circular saw are properly adjusted.  
Trimmer line should be extended to cut-off knife.  
3. Start engine and run several minutes to bring to  
operating temperature. Flash choke twice during  
warm-up to clear any air from the fuel system.  
4. Stop engine.TurnHspeed needle CCW (counter  
clockwise) to stop.Turn “Lspeed needle midway  
between full CW (clockwise) stop and CCW stop.  
5. Idle Speed Adjustment  
Start engine, turnidle” speed adjustment  
screw CW until the saw chain begins to turn,  
then turn screw out CCW until attachment  
stops turning.Turn screw out, CCW, an  
addtional 1/4 turn.  
WARNING  
DANGER  
CUTTING ATTACHMENT MUST NOTTURN OR  
MOVEWHEN UNIT IS IDLING.  
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6. Accelerate to full throttle for 2 - 3 seconds to clear  
any excess fuel in the engine, then return to idle.  
Accelerate engine to full throttle to check for  
smooth transition from idle to high speed. If engine  
hesitates turn “Lneedle CCW 1/8 turn and repeat  
acceleration. Continue adjustment until smooth  
acceleration results.  
7. Check idle speed and reset if necessary as  
described in item 5.  
CAUTION  
When strarting, idling adjustment speed  
should be adjusted not to rotate the cutting  
attachment. Correct idle speed is adjusted  
2,900 to 3,100 r/min. Or 1/4 turn counter  
clockwise from the point the cutting  
attachment stops moving.When there is some  
trouble with the carburetor, refer to your  
distributor or dealer.  
EIGHT CUTTER BLADE  
Use only the blade designated by the manufacturer  
for this model.  
When crack is noticed on the blade, never use it,  
but replace with a new one.  
Round the teeth bottom for 1- 2 mm radius in order  
to avoid the crack using a round file.  
30°  
Cutter edge  
2R  
-
-
Rounded part is not to be sharpened.  
Sharpen each cutter equally so as to retain  
the balance of the blade.  
In sharpening the edge by use of a grinder, do  
not cool the cutter abruptly by immersing it in  
water.  
Not sharpened  
2mm  
-
Tooth bottom  
MAGNETO  
The unit is incorporated with a CDI (Capactior Discharge  
Ignition) system, which does not require adjustment  
of ignition timing and the contact breaker point gap.  
Ensure wire connections and couplers assembling.  
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TROUBLE SHOOTING  
Poor performance of the engine and/or trimming mechanism can normally be prevented by carefully following  
instructions.  
Poor performances can easily be corrected even by a beginner.  
When the engine does not function properly check the following three (3) points first.  
Is engine compression adequate?  
Is fuel system in good condition and is enough fuel being supplied?  
Is electrical system in good condition and is spark plug operating normally?  
When there is serious trouble with the unit, do not try to repair it yourself but have your distributor or dealer do it  
for you. For detailed TROUBLE SHOOTING refer to tables 1 and 2. Locate the problem on the following charts  
and repair as necessary.  
Fuel strainer clogged  
Fuel pipe clogged  
Clean.  
Fuel is not  
reaching  
carburetor  
Table 1  
Clean.  
Suction insufficient  
Make sufficient.  
Clean.  
Fuel is not  
reaching  
cylinder  
Strainer clogged  
Carburetor out of order  
C.D.I. module defective  
Ignition coil defective  
Wire connection defective  
Disassemble and check.  
Remove and replace.  
Remove and replace.  
Reconnect.  
No spark at high  
tension cord end  
High-tension cord connection  
defective  
Repair as necessary.  
Switch is grounded  
Insulator cracked  
Switch on.  
Replace plug.  
Adjust.  
Spark gap incorrect  
Covered with carbon  
Fouled with fuel  
No spark at plug  
Clean or replace.  
Clean or replace.  
Start correctly.  
Readjust.  
Starting procedures incorrect  
Low and high speed needle  
setting too lean  
Fuel does  
not keep  
running  
Metering lever spring too strong  
Fuel pump diaphram defective  
Fuel passage clogged with dust  
Readjust  
Replace.  
Disassemble and clean.  
Retighten all screws.  
Fuel leaking from fixing  
surfaces of carburetor  
Accelera-  
tion and  
low speed  
function  
defective  
Air valve, fuel tank cap  
does not work normally  
Replace or clean.  
Fuel pump does not operate  
Check impulse drilling.  
Clean.  
Fuel inlet needle valve  
clogged with dust  
Carburetor  
overflow  
Metering lever spring not placed  
in dent of lever  
Correct.  
This is because fuel mixture  
is too rich.  
Start the engine several  
times with choke shutter fully  
open and run at fast idle until  
engine does not smoke.  
Muffler sticky  
with fuel  
Bearing damaged  
Disassemble and replace.  
Disassemble and replace.  
Disassemble and replace.  
Disassemble and replace.  
Piston and/or cylinder seized  
Crankshaft worn  
Engine does  
not crank  
Crankshaft contacting  
crankcase  
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Table 2  
Improper fuel used  
Use fuel with correct mixing ratio.  
Never use gasoline of poor quality.  
Spark plug defective (burnt)  
Replace.  
As cooling fins clogged, air  
does not pass well  
Clean fins.  
Engine overheated  
Excessive deposits in  
combustion chamber  
Disassemble and remove carbon.  
Plug damaged or fouled  
Replace or clean.  
Check wiring.  
Firing function defective  
Carburetor defective  
Combustion poor due to  
defective wiring  
High-speed needle  
setting incorrect  
Readjust.  
Carburetor overflow  
Air cleaner clogged  
Refer to Table 1.  
Clean as necessary.  
Compression insufficient  
(piston ring stuck or worn  
out)  
Disassemble, check and replace  
if necessary.  
Other troubles  
Cylinder chromium plating  
peeled or worn out  
Replace cylinder.  
Clean as necessary.  
Readjust.  
Exhaust port clogged with  
carbon  
Throttle is not fully open  
Improper setting  
Set properly.  
Correct properly.  
Adjust load.  
Replace.  
Blade does not cut well  
Blade does not rotate  
Height of cutter uneven  
Overloaded  
Clutch shoe worn out  
LONGTERM STORAGE  
Inspect and adjust every part of the unit.  
Drain fuel tank, pull starter handle slowly a few  
times to drain fuel from carburetor.  
Pour a small amount of clean motor oil into spark  
plug hole, pull starter handle and then crank the  
engine untilTOP DEAD CENTER.  
-
-
-
Completely clean every part, and repair, if  
necessary.  
Apply thin coating of oil on metal parts to  
prevent rust.  
Remove the cutter head, apply sufficient oil  
coating and wrap up in plastic.  
Store in a dry area, free from dust.  
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