TRIMMER/
BRUSHCUTTER
SRM-3800
TYPE1-E
WARNING DANGER
READ INSTRUCTIONS CAREFULLY AND
FOLLOW RULES FOR SAFE OPERATION.
FAILURE TO DO SO COULD RESULT IN
SERIOUS INJURY.
847
1
898696-43132
X750226-3801
INTRODUCTION
The ECHO Trimmer/Brushcutter, model SRM-3800
TYPE1-E is lightweight, high performance gasoline
powered rotary trimmer which is designed for
brushcutting, weed control and grass trimming in areas
which are difficult to control by any other means. The
trimmer is equipped with a safety shoulder harness,
and the excellent balance characteristics plus the
available po wer, ensures comf ortable operation.
This manual provides the information necessary for
assembly , adjustment, operation and maintenance of
your unit.
CONTENTS
RULES FOR SAFE OPERATION................................................................................................................ 2
NOMENCLA TURE OF PARTS..................................................................................................................... 3
TECHNICAL DAT A ...................................................................................................................................... 3
ASSEMBLING ............................................................................................................................................ 4
OPERA TION ............................................................................................................................................... 6
MAINTENANCE AND CARE........................................................................................................... ............ 16
TROUBLE SHOOTING ............................................................................................................................... 19
LONG TERM STORAGE............................................................................................................................. 20
- 1 -
RULES FOR SAFE OPERA TION
SAFETY INSTRUCTIONS
1. Do Not operate the unit when you are
fatigued.
2. Do Not operate if other people or animals
are in the work area.
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 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.
WARNING DANGER
1. Do Not smoke while handling gasoline.
2. Do Not refuel a hot engine. W ait unit it cools .
3. Do Not overfill the tank. Spiled fuel must be wiped
up.
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.
7. Always store gasoline in an approv ed container.
A TTENTION
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 .)
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.
3. Do not operate without eye protection goggles
available from y our ECHO dealer.
WARNING DANGER
SERIOUS INJURY MAY RESUL T FROM THE
IMPROPER USE OF STEEL BLADES.
COMPL Y WITH ALL SAFETY INSTR UCTIONS
LISTED IN THE OPERA T OR’S MANUAL AND
SUPPLIED WITH THE BLADES.
1.THE ECHO SAW T OO TH BLADE IS
DESIGNED T O CUT BRUSH AND SMALL
TREES.
2.THE ECHO 8 TOOTH R OT AR Y KNIFE BLADE
IS DESIGNED T O CUT HEA VY WEEDS AND
GRASS. TO A V OID INJURY DUE T O KICK
BACK OR BLADE FRA CTURE, DO NOT USE
THIS BLADE T O CUT BRUSH OR TREES.
3.ECHO INC. WILL NOT BE RESPONSIBLE
FOR THE F AILURE OF CUTTING DEVICES
WHICH HA VE NOT BEEN TESTED AND
APPRO VED BY ECHO FOR USE WITH THIS
UNIT .
- 2 -
NOMENCLA TURE OF P A RTS
Spark plug
Choke knob
Air cleaner
cover
T op guard
Muffler
Fuel tank
Starter handle
TECHNICAL DATA
Gear housing
Drive shaft assembly
Ignition switch
Throttle trigger
Shield
Grip
Shoulder harness
SRM-3800 TYPE1-E
Dimension L × W × H cm (inch) 181.5 × 72 × 46 (71.5 × 28.4 × 18.1)
Masses kg (lbs) 8.0 (17.6): without shoulder harness and cutter head
Engine T ype Air cooled two stroke single cylinder
Displacement mL (cu.inch) 37.4 (2.28)
Max revolution r/min 10,000
Carburetor Walbro diaphragm type WT
Ignition Flywheel magneto : CDI (Capacitor Discharge Ignition)
system
Spark plug NGK BPM7A or CHAMPION CJ-7Y
Starter 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.
T ank capacity L (FL.OZ.US) 0.95 (32.2)
Drive shaft Cutter (Option) Nylon line cutter head
assembly Cutter Circular saw , 25 cm (10 inch)
Cutter (Option) 8 cutter blade, 20 cm (8 inch)
Gear housing 60 degree bevel gears, ratio 1 : 1.33 (Counter-
clockwise)
Lubrication Shell Delpena or good quality lithium grease
Drive shaft High tensile solid steel, 5 bearings
Shield Metal shield mounted on the gear housing for nylon line
and metal blade applications.
Technical data subject to change without notice.
- 3 -
Bolts
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.
• Tignten bolts to fasten drive shaft assembly.
W ARNING D ANGER
NEVER ST ART ENGINE WITHOUT
DRIVESHAFT ASSEMBL Y INST ALLED .
THIS COULD RESULT IN SERIOUS INJURY .
1. Right hand grip assembly
2. Slot
3. Right hand U-handle
2
1. Grip assembling bolt
1. Handle assembling bolt (8 mm)
2. Bolt retainer tube
1
HANDLE
Insert right hand grip assembly into right hand Uhandle and fit it to the slot for rotation prevention of
right hand U-handle.
3
Fit grip assembling bolt and secure the grip firmly .
1
Remove bolt retainer tube from end of handle
1
assembling bolt (8 mm).
1. Handle assembling
bracket (upper)
2. Handle assembling
bolt (8 mm)
3. Left handle
4. Handle assembling
bracket (lower)
5. To engine
2
Install handle assembling bracket (upper) in handle
2
3
4
1
5
assembling bracket (lower) and fix handle by tightening
handle assembling bolt (8 mm) lightly.
- 4 -
1. Right handle assembling bolt
2. Right handle assembling bracket
3. Right hand U-handle
4. To engine
2
3
Loosen 4 right handle assembling bolts and insert right
hand U-handle into right handle assembling bracket.
1
(toward direction of arrow )
Fix the right hand U-handle by tightening 4 right handle
assembling bolts lightly.
4
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
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 .
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. Wire fixing clip
2. Throttle wire
1. Right hand
U-handle
2. Wire fixing clip
3. Shaft tube
4. Throttle wire
1
2
1
2
3
4
- 5 -
Stop lead
Ground
Nut (B)
lead
Nut (A)
Swivel
4
2
6
7
1
3
THRO TTLE CABLE
The engine is delivered with throttle cable (engine side)
separated, assemble the cable to carburetor as follows.
• Remove the cov er .
• Remove nut (A) and one washer from throttle
cable.
• 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.
• 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 .
• Connect stop lead and ground lead by couplers .
SHIELD
5
Fit the shield on the gear housing and tighten screws
with washers (Seven points) as shown.
Shoulder strap
assembly
Quick release
latch
Waist pad
OPERATION
Oil
Gasoline
OIL : ECHO brand premium two-stroke 50:1 oil is
reguirred.
Mix oil and gasoline /gasohol according to insturctions
on the oil container label.
1
50
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.
GENERAL CHECK
• Eneure that all nuts, screws and bolts installed
are properly tightened.
FUEL ST A TEMENT
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 methy l
(wood) alcohol is not approved.
R+M
2
MIXING : F ollow directions on the oil container .
- 6 -
Fuel mix chart
(50 : 1)
US METRIC
GAS O IL GAS OIL
GAL. FL.OZ. L mL
1 2.6 4 80
2 5.1 8 16 0
5 12.8 2 0 400
Throttle trigger
Purge bulb
Ignition switch
Throttle
control lockout
IMPORT ANT
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. AL W A YS
shake fuel container thoroughly before each
use.
ST ARTING COLD ENGINE
• Slide switch to START/RUN position as sho wn.
• 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.
• 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 .
NOT E
Recoil starter : Use short pulls - only 1/2 - 2/3 of
starter rope for starting. Do not let starter rope
snap back in .
Always hold the unit firmly.
Fuel return line
ST ARTING WARM ENGINE
• When engine is warm, star t it by pulling recoil
starter rope with switch positioned at ST ART/R UN.
(Keep choke le ver in R UN (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.
• Side ignition switch to “ST OP” position.
COLD ST AR T
(Close)
Choke knob
RUN
(Open)
- 7 -
HOLD THE UNIT FIRMLY .
OPERATING THE TRIMMER
• 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.
- Av oid striking any obstruction such as rocks,
stones or tree stumps which can damage the
cutter head .
Do not cut into the ground.
- T o av oid 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.
W ARNING D ANGER
DO NOT ALLO W EITHER PEOPLE OR
ANIMALS INTO THE WORK AREA.
AL WAYS WEAR SAFETY GOGGLES WHEN
CUTTING.
DRESS PROPERLY - A V OID LOOSE
CLOTHING.
WHEN GRASS OR WEEDS HA VE CLOGGED
THE CUTTER HEAD AFFECTING NORMAL
OPERA TION, FIRST , STOP THE ENGINE AND
THEN REMOVE THE DEBRIS.
W ARNING D ANGER
••
• BEFORE ST ARTING UP THE ENGINE, MAKE
••
SURE THA T THE CUTTER BLADE IS NOT
CONT ACTING ANYTHING.
••
• WHEN TWO OR MORE OPERA T ORS ARE
••
WORKING TOGETHER, ENSURE THA T A
SAFE DIST ANCE IS KEPT BETWEEN
THEM.
OPERA TING INSTRUCTIONS (METAL
BLADES and OPTIONAL NYLON LINE)
Y our brushcutter/trimmer , has been designed and constructed 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 P age 2, in order to prevent accidents
and possible injury .
- 8 -
ECHO 2-LINE MANUAL TRIMMER HEAD
(OPTION)
WARNING DANGER
GRASS/WEED TRIMMERS CAN THRO W
GRA VEL, ST ONE, WOOD CHIPS, GLASS, AND
PLASTIC OR MET AL OBJECTS. THE DEBRIS
SHIELD BEHIND THE TRIMMER HEAD STOPS
MUCH OF THE DEBRIS, B UT CANNOT
PREVENT THE OPERAT OR FROM BEING
STRUCK BY SOME DEBRIS. READ THE RULES
FOR SAFE OPERA TION IN THE OPERATOR’S
MANUAL THA T YOU RECEIVED WITH YOUR
ECHO TRIMMER. AISO, FOLLOW AII
INSTRUCTIONS IN THIS INSTRUCTION SHEET.
1 . Read the Operator’s Man ual carefully . Be throughly
familiar with the controls and proper use of the
trimmer.
Know how to stop the unit and disengage the
controls.
2 . Ne ver 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.
1B
2A
SPOOL
HOUSING
15 cm (6 inch)
1C
1D
2B
BOL T
SPRING
KNOB
1. REPLA CING LINE
A. Remove spool by turning knob clockwise, “right”,
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.
2.REPLACING SPOOL
NOTE
Keep line tight on spool.
A. Snap spool into housing while pulling line through
eyelets with about 15 cm (6 inch) extending out.
CAUTION
Knob tightens counterclockwise, “left”.
B. Fasten spool to housing with shaft bolt, spring,
and knob.
- 9 -
Locking tool
Upper fixing plate
Cutting
head
TIGHTEN
INST ALLA TION OF NYLON LINE HEAD
(OPTION)
Set the nylon line head to the drive shaft and tighten
by turning as shown.
OPERA TING INSTRUCTIONS n ylon 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.
CUTTING PROCEDURES
PULL
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.
W ARNING D ANGER
IN CASE OF EMERGENCY , PULL THE QUICK
RELEASE LA TCH T O DISCONNECT THE
TRIMMER FROM THE HARNESS.
Quick
release
latch
- 10 -
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.
TREE
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.
SWEEPING
1. Sweeping grass and other debris from a hard
surface can be done very quickly.
- 11 -
STEEL BLADE OPERA TIONS
Your ECHO Trimmer/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
W ARNING D ANGER
1. SERIOUS INJUR Y MA Y RESULT FROM THE
IMPROPER USE OF STEEL BLADES. READ
AND COMPL Y WITH SAFETY
INSTRUCTIONS LISTED IN THIS MANU AL.
2. THE EIGHT T OOTH BLADE IS DESIGNED
SPECIALL Y TO CUT WEED AND GRASS. T O
A VOID INJUR Y DUE T O KICKBACK OR
BLADE FRACTURE, DO NOT USE THIS
BLADE TO CUT BR USH OR TREES.
3. ECHO INC. WILL NOT BE RESPONSIBLE
FOR THE F AILURE OF CUTTING DEVICES
WHICH HA VE NOT BEEN TESTED AND
APPRO VED BY ECHO FOR USE WITH THIS
UNIT .
W ARNING D ANGER
SAFETY PRECAUTIONS
1. AL W A YS USE THECORRECT BLADE FOR
THE JOB AS RECOMMENDED.
2. BE CAREFUL NOT TO HIT ROCKS, ST ONES,
TREE STUMPS OR ANY FOREIGN OBJECT
WHICH MA Y DAMA GE THE BLADE.
3. DO NO T CUT INTO THE GR OUND TO AVOID
DULLING THE BLADE.
4. AL W AYS STOP THE ENGINE AND EXAMINE
THE BLADE AFTER STRIKING AN
OBSTRUCTION. DO NO T OPERA TE WITH A
BLADE WHICH IS BLUNT , BENT ,
FRACTURED, OR DISCOLORED DUE T O
OVERHEA T .
5. IN THE EVENT, THA T THE BLADE STRIKES
AN OBSTRUCTION, OR IS O THER WISE
PREVENTED FROM ROTA TING IN NORMAL
OPERA TION, THE CENTRIFUGAL CLUTCH
WILL SLIP T O PREVENT ENGINE DAMA GE.
IN THIS CASE, STOP THE ENGINE, FREE
AND EXAMINE THE BLADE AND IF IN
GOOD ORDER, RESUME OPERA TION.
6. SHOULD THE BRUSHCUTTER BE OPERA TED FOR AN EXTENDED PERIOD OF HIGH
TEMPERA TURES, THE GEAR BOX MA Y
BECOME VERY HOT. IF TOO HOT TO TOUCH,
ALLOW THE UNIT TO COOL DOWN, CHECK
THE LUBRICA TION AS PER
‘MAINTENANCE’ AND CONTINUE T O
OPERA TE IF IN ORDER.
7. T O A VOID ENGINE D AMAGE, DO NOT R UN
ON FULL THROTTLE WITHOUT LO AD .
8. DO NO T OPERA TE THE BRUSHCUTTER
WITHOUT THE HARNESS AND DEBRIS
SHIELD CORRECTL Y FITTED .
9. AL W A YS INSPECT THE WORK AREA AND
REMOVE ANY FOREIGN OBJECTS.
- 12 -
Quick
release
latch
PULL
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.
W ARNING D ANGER
IN CASE OF EMERGENCY , PULL THE QUICK
RELEASE LA TCH T O DISCONNECT THE
TRIMMER FROM THE HARNESS.
SHIELD
When using a metal blade. Use same as Nylon line.
- 13 -
INSTALLING THE 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)
TIGHTEN
Weed/Grass Blade
(8 tooth)
Upper fixing plate
Locking tool
Box wrench
2. Rotate the drive shaft until the holes in the upper
fixing plate and the gear box are aligned. Inser t
the locking tool.
3. Remove the nylon line line head, if fitted, by turning
in a clockwise direction.
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.
Locking tool
Assemble cutter blade properly
Gear housing
Adapter
plate (Upeer)
Nut
Split pin
Lower fixing plate
Locking
tool
Adapter
plate (Lower)
Split pin
6. Fit a new split pin as supplied in the tool kit to
secure the locking nut.
NOTE
• The drive shaft is fitted with left hand threads,
therefore turn counterclockwise to tighten as
illustrated.
• Always use a new split pin to secure the
locking nut.
Split pin 2 × 22 mm
Part No. 898502-01130.
- 14 -
HEAVY WEED 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.
SMALL TREES
• 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.
- 15 -
CAUTION
1. Always cut on full throttle.
2. Never try cutting with a blunt blade.
Cover
Air filter
MAINTENANCE AND CARE
- AL WAYS KEEP THE UNIT CLEAN -
AIR FIL TER
• 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.
- 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 , w ash it in suitab le
cleaning fluid or replace it.
Fuel strainer
Muffler cover
Lid
Screen
MUFFLER AND EXHAUST POR T (SAM)
• 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.
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.
- 16 -
0.6 - 0.7mm (.024 - .028 in.)
Gear
housing
Bolt
SP ARK 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 N
⋅⋅
⋅m (125 - 135 in.lb)
⋅⋅
CAUTION
Do not over torque.
GEAR HOUSING
• Remove the bolt every 50 hours and check.
• Replenish as necessary, b ut do not ov erfill.
- Shell delpena or good quality lithium multi
grease is recommendable.
High spped needle (H)
Low speed needle (L)
Idle speed adjustment screw
CARBURETOR ADJUSTMENT
Every unit is run at the factory and the carburetor is
set in compliance with California Emission Regulations, In addition, the carburetor is equipped with “H”
(High Speed Needle) and “L” (Low Speed Needle) needle adjustment limiters that prevent settings outside
acceptable limits.
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. T urn “H” speed needle CCW (counter
clockwise) to stop. T urn “L” speed needle midway
between full CW (clockwise) stop and CCW stop.
5. Idle Speed Adjustment
• Start engine, turn “idle” speed adjustment
screw CW until the saw chain begins to turn,
then turn screw out CCW until attachment
stops turning. T urn screw out, CCW , an
addtional 1/4 turn.
- 17 -
W ARNING D ANGER
CUTTING A TT A CHMENT MUST NOT TURN OR
MOVE WHEN UNIT IS IDLING.
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 “L” needle 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 .
30°
Not sharpened
2mm
Cutter edge
2R
T ooth bottom
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.
- 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.
MAGNET O
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.
- 18 -
TROUBLE SHOO TING
Poor perf ormance of the engine and/or trimming mechanism can normally be prevented by carefully f ollowing
instructions.
Poor perf ormances can easily be corrected even b y 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. F or detailed TROUBLE SHOO TING ref er to tables 1 and 2. Locate the problem on the f ollowing charts
and repair as necessary.
T able 1
Engine does not start (or, is difficult to start)
Engine cranks
There is fuel in the tank
Fuel is reaching carburetor
Fuel is not
reaching
carburetor
Fuel is not
reaching
cylinder
No spark at high
tension cord end
No spark at plug
Fuei is reaching cylinder
There is spark at high
tension cord end
There is spark at plug
Starting procedures
correct
Engine does
not crank
Fuel does
not keep
running
Acceleration and
low speed
function
defective
Carburetor
overflow
Fuel strainer clogged Clean.
Fuel pipe clogged Clean.
Suction insufficient Make sufficient.
Strainer clogged Clean.
Carburetor out of order Disassemble and check.
C.D.I. module defective Remove and replace.
Ignition coil defective Remove and replace.
Wire connection defective Reconnect.
High-tension cord connection Repair as necessary.
defective
Switch is grounded Switch on.
Insulator cracked Replace plug.
Spark gap incorrect Adjust.
Covered with carbon Clean or replace.
Fouled with fuel Clean or replace.
Starting procedures incorrect Start correctly.
Low and high speed needle Readjust.
setting too lean
Metering lever spring too strong Readjust
Fuel pump diaphram defective Replace.
Fuel passage clogged with dust Disassemble and clean.
Fuel leaking from fixing Retighten all screws.
surfaces of carburetor
Air valve, fuel tank cap Replace or clean.
does not work normally
Fuel pump does not operate Check impulse drilling.
Fuel inlet needle valve Clean.
clogged with dust
Metering lever spring not placed Correct.
in dent of lever
Muffler sticky Start the engine several
with fuel times with choke shutter fully
Bearing damaged Disassemble and replace.
Piston and/or cylinder seized Disassemble and replace.
Crankshaft worn Disassemble and replace.
Crankshaft contacting Disassemble and replace.
crankcase
This is because fuel mixture
is too rich.
open and run at fast idle until
engine does not smoke.
- 19 -
T able 2
Engine overheated
Firing function defective
Carburetor defective
Engine speed insufficient
Other troubles
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 Clean fins.
does not pass well
Excessive deposits in Disassemble and remove carbon.
combustion chamber
Plug damaged or fouled Replace or clean.
Combustion poor due to Check wiring.
defective wiring
High-speed needle Readjust.
setting incorrect
Carburetor overflow Refer to Table 1.
Air cleaner clogged Clean as necessar y.
Compression insufficient Disassemble, check and replace
(piston ring stuck or worn if necessary.
out)
Cylinder chromium plating Replace cylinder.
peeled or worn out
Exhaust port clogged with Clean as necessary.
carbon
Machine does not trim properly
Blade does not cut well
Blade does not rotate
Eengine runs normally
Throttle is not fully open Readjust.
Improper setting Set properly.
Height of cutter uneven Correct properly.
Overloaded Adjust load.
Clutch shoe worn out Replace.
LONG TERM STORAGE
• Inspect and adjust every part of the unit.
- Completely clean ev ery 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.
• 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 until T OP DEAD CENTER.
• Store in a dry area, free from dust.
- 20 -
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