Raycer RAY24CBT User manual

1
ORIGINAL INSTRUCTION
PETROL GRASS TRIMMER
Model: RAY24CBT
INSTRUCTION MANUAL
WARNING: Read this ma ual carefully before use it.
BUILDER SAS
32, rue Aristide Bergès - ZI 31270 Cug aux - Fra ce
MADE IN PRC 2020

2
CONTENTS
INTRODUCTION/TECHNICAL DATA………………………...……3
GRAPHIC WARNINGS…………………………………………...….4
SAFETY RULES & PRECAUTIONS……………………………..…6
DESCRIPTION………………………………………………….…….9
ASSEMBLY…………………………………………………..……….1
RULES FOR SAFE OPERATION……………………………………11
CUTTING WITH A NYLON HEAD…………………………………12
FUEL & OIL MIXTURE…………………………………………..….14
PREPARING FOR OPERATIONS. …………………………………. 15
OPERATIONS…………………………………………………………16
MAINTENANCE & CARE………………………………………….. .17
TROUBLE SHOOTING………………………………………………..18
TRANSPORT,HANDLING/EXTENDED STORAGE………………...18
TROUBLESHOOTING GUIDE……………………………………..…21

3
INTRODUCTION
Thank you for your purchasing the grass trimmer of our company. The present
manual explains how to handle the grass trimmer well. Before using it, please read
this operator’s manual carefully, operate the machine correctly and engage in your
task with safely.
By the way, due to changes of specifications, all details of your machine may not
agree with this manual. Please understand accordingly.
-------------- TECHNICAL DATA ---------------
Technical Data subject to changed without notice.
MODEL RAY24CBT
Main
unit
Re ote type Direct Drive; flexible shaft
Maxi u speed of linker shaft
/engine speed( in
-1
) 9000/9000
Idle speed of engine( in
-1
) 3000
Vibration(in accordance with ISO 22867): Front handle 6.415 /s
2
Rear handle 7.556 /s
2
- Uncertainty K 1.5 /s
2
Noise(in accordance with ISO 22868):
- Sound pressure level LpA
L
PA
= 97 dB(A)
K = 3 dB(A)
Noise(in accordance with ISO 22868):
- Sound power level LwA
L
WA
= 109 dB(A)
K = 3 dB(A)
Guaranteed Sound power values
(in accordance with 2000/14/EC) 111 dB(A)
Line Max. Cutting Path / Dia eter of line 380 / Ø2.0
Nylon head rotation direction Clockwise(seen fro the top)
Type of alu inu pole 2 pieces
Weight when dry(kg) 5.0
Engine
Na e of engine SPK1E33F
Type Air-cooled;2 cycle; vertical
Piston valve; gasoline engine
Displace ent(c
3
) 25
Maxi u output(kW/ in
-1
) 0.75/7500
Carburetor Diaphrag -type
Ignition Non-contact electronic ignition
Method of starting Recoil type
Fuel used Gasoline ixed with lubricating oil
(ratio of 40:1)
Fuel tank capacity( c
3
) 500

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GRAPHIC WARNINGS
Because a trimmer is a high-speed, fast cutting power tool, special safety precaution
must be observed to reduce the risk of personal injury. Read this manual carefully.
Be familiar with the controls and the proper use of the unit. Know how to shut it off,
and how to unhook a harnessed unit quickly.
This graphic accompanied by the words WARNING and
DANGER calls
attention to an act of a condition which can lead to
SERIOUS
INJURY.
READ & UNDERSTAND Operator’s Manual and Safety
Manual.
ALWAYS WEAR EYE PROTECTION, EAR
PROTECTION AND HEAD PROTECTION.
WEAR FOOT PROTECTION
WEAR GLOVES
BEWARE OF FOOT INJURY BY CUTTING
ATTACHMENT
BEWARE OF THROWN OBJECTS HIT BY CUTTING
ATTACHMENTS. NEVER USE WITHOUT PROPERLY
MOUNTED BLADE GUARD.
KEEP 15 METERS AWAY FROM ANY OTHER PERSON
RISK OF HOT SURFACE
GUARANTEE SOUND POWER LEVEL

5
Always TURN OFF ENGNINE and make sure the cutting tool has
stopped before cleaning, removing or adjusting blade.
WARNING!
WARNING! WARNING!
WARNING! Never modify a trimmer in any way.
Improper use of the machine can cause SERIOUS OR
FATAL PERSONAL INJURY.
WARNING DANGER
The engine exhaust form this product contains chemicals to cause
cancer, birth defects, of other reproductive harm.
Specifications, descriptions and illustrative material in this manual are as accurate as known at the
time of publication, but are subject to change without notice. Illustrations may include optional
equipment and accessories, and may not include all standard equipment.
Straps fixed: the hook links into the hole which on handle
Strapes take off: Press the spring piece then take it off from the hole.

6
SAFETY RULES & PRECAUTIONS
Proper safety precautions must be observed. Like all power equipment this unit
must be handled carefully. DO NOT EXPOSE YOURSELF OR OTHERS TO
DANGER. Follow these general rules. Do not permit others to use this machine
unless they are thoroughly responsible and have read, and understand the
machine manual and are trained in its operation.
● Always wear safety goggles for eye protection. Dress properly, do not wear
loose clothing or jewelry that could become caught in moving parts of the unit.
Safe, sturdy, nonskid footwear should always be worn. Long hair should be tied
back. It is recommended that legs and feet be covered to protect from flying
debris during operation.
● Inspect the entire machine for loose parts (nuts, bolts, screws, etc.) and any
damage. Repair or replace as necessary before using the machine.
DO NOT USE any attachment with this power head other than the ones
recommended by our company. Serious injury to the operator or bystanders could
result as well as damage to the machine.
● Keep the handles free from oil and fuel.
● Always use proper handles and shoulder strap when cutting.
● Do not smoke while mixing fuel or filling tank.
● Do not mix fuel in an enclosed room or near open flames. Assure adequate
ventilation.
● Always mix and store the fuel in a properly marked container that is approved
by local codes and ordinances for such usage.
● Never remove the fuel tank cap while the engine is running.
● Never start or run the engage inside a closed room or building. Fumes from the
exhaust contain dangerous carbon monoxide.
● Never attempt to make engine adjustments while the unit is running and
strapped to the operator. Always make engine adjustments with the unit resting
on a flat, clear surface.
● Do not use the unit if it is damaged or poorly adjusted. Never remove the machine’s
guard. Serious injury to the operator or bystanders could result as well as damage to the
machine.
● Inspect the area to be cut and remove all debris that could become entangled in the
nylon cutting head. Also remove any objects that the unit may throw during cutting.
● Keep children away. Onlookers should be kept at a safe distance from the work area,

7
at least 15 METER(5 FEET)
● Never leave the machine unattended.
● Do not use this unit for any job other than those for which it is intended as described in
this manual.
● Do not overreach. Keep proper footing and balance at all times. Do not run the unit
while standing on a ladder or on any other unstable footing location.
● Keep hands and feet clear of the nylon cutting head while unit is in use.
● Do not use this type of machine for sweeping away debris.
● Do not use the unit when you are tired, ill or under the influence of medication ,drugs
or alcohol.
● Use nylon cutting head which is free of damage. If a stone or any other obstacle is hit,
stop the engine and check the nylon cutting head. A broken or unbalanced nylon cutting
head must never be used.
FOLLOW INSTRUCTION FOR CHANGING ACCESSORIES.
● Do not store in a closed area where fuel vapors can reach an open flame from hot
water heaters, furnaces, etc. Store in a locked, well ventilated area only.
● Ensure safe and proper performance of your product. These part are available from
your dealer. The use of any other accessories or attachments may cause a potential
hazard or injury to the user, damage to the machine and void this warranty.
● Clean the machine completely, especially, the fuel tank, its surroundings, and the air
cleaner.
● When refueling, be sure to stop the engine and confirm that it is cooled down.. Never
refuel when the engine is running or hot. When gasoline spills, be sure to wipe it up
completely dispose of those materials before starting the engine.
● Stay clear of other workers or bystanders by at least 15 meters/5 feet.
● When ever approaching an operator of the machine, carefully call his attention and
confirm that the operator stop the engine. Be careful not to startle or distract the operator
which can cause an unsafe situation.
● Never touch the nylon cutting head when ever the engine is running. If it is necessary
to adjust the protector or nylon cutting head, be sure to stop the engine and confirm that
the nylon cutting head has stopped running.
● The engine should be turned off when the machine is moved between work areas.
● Be careful not to hit the nylon cutting head against stones, or the ground.
Unreasonable rough operation will shorten the life of the machine as well as create an
unsafe environment for yourself and those around you.
● Pay attention to loosening and overheating of parts. If there is any abnormality of
the machine, stop operation immediately and check the machine carefully. If
necessary, have the machine serviced by a authorized dealer. Never continue to
operate a machine which may be malfunctioning.
● In start-up or during operation of the engine, never touch hot parts such as the
muffler, the high voltage wire or the spark plug.
● After the engine has stopped, the muffler is still hot. Never place the machine in
any places where there are flammable materials (dry grass, etc.), combustible gasses
or combustible liquids.
● Pay special attention to operation in the rain or just after the rain as the ground may
be slippery.
● If you slip or fall to the ground or into a hole, release the throttle lever immediately.
● Be careful not to drop the machine or hit it against obstacles.

8
● Before proceeding to adjust or repair the machine, be sure to stop the engine and
detach the spark plug.
● When the machine is placed in storage for a long time, drain fuel from the fuel tank
and carburetor, clean the parts, move the machine to a safe place and confirm that the
engine is cooled down.
● Make periodic inspections to assure safe and efficient operation. For a thorough
inspection of your machine, please contact a dealer.
● Keep the machine away from fire or sparks.
● It is believed that a condition called Raynaud’s phenomenon, which affects the
fingers of certain individuals may be brought about by exposure to vibration and cold.
loss of color and numbness in the fingers. The following precautions are strongly
recommended because the minimum exposure which might trigger the ailment is
unknown.
Keep your body warm, especially the head, neck, feet, ankles, hands and wrists.
Maintain good blood circulation by performing vigorous arm exercises during
frequent work breaks and also by not smoking.
Limit the hours of operation. Try to fill each day with jobs where operating the brush
cutter or other hand-held power equipment is not required.
If you experience discomfort, redness and swelling of the fingers followed by
whitening and loss of feeling, consult your physician before further exposing yourself
to cold and vibration.
● Always wear ear protection, loud noise for long time can make hearing debase even
lost hearing.
● Total face and head protection must be wear to prevent damage from plummet or
branch.
● Wear no-slip heavy duty work gloves to improve your grip on the brush cutter
handle. Gloves also reduce the transmission of machine vibration to
your hands.
● WARNING: The cutter area is still dangerous while the machine is coasting to a
stop.
●WARNING: emission of exhaust gases
●WARNING: national regulation can restrict the use of the machine.

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DESCRIPTION
SAFETY MANUAL included with unit. Read before operating and keep for future
reference to learn proper, safe operating techniques.
1. NYLON CUTTER HEAD Contains replaceable nylon trimming line that
advances when the trimmer head is tapped against the ground while the head is
turning at normal operating speed.
2. CUT-OFF KNIFE Trims nylon filament to the correct length-7״, head to end of
line-when nylon trimming head is bumped on the ground during operation, line
advance. If trimmer is operated without a cut-off knife the line becomes too long
(more than7”) the engine, this will overheat or damage the engine.
3. DEBRIS SHIELD Mounted just above the cutting attachment. Helps protest
operator by deflecting debris produced during debris produced during the
trimming operation. Do not operate unit without shield.
4. D-HANDLE this handle can be adjust-ed at you convenience for comfort.
5. DRIVE SHAFT ASSEMBLY Contains a specially designed liner flexible drive
shaft.
6. IGNITION SWITCH “slide switch” mounted on top of the Throttle Trigger
Housing. Move switch FORWARD to Run, BACK TO STOP.
7. SAFETY LEVER Before acceleration, compress it please.
8. THROTTLE TRIGGER Spring loaded to return to idle when released. When
accelerating, press trigger gradually for best operating technique. Do not hold
trigger while starting.
9. PURGE BULB Pushing purge bulb (7 to 1 times before starting),will remove
all air and sale fuel from fuel system and bring fresh fuel to the carburetor.
1 . FUEL TANK LID.
11. FUEL TANK Contains fuel and fuel filter.
12. AIR CLEANER COVER Contains replaceable felt element.
13. CHOKE the choke control is located on the top of the filter cover.
14. STARTER HSNDLE pull handle until engine starts, then return handle slowly.
DO NOT let handle snap back or damage to starter will occur.

1
ASSEMBLY INSTRUCTIONS
 HANDLE ASSEMBLY
NOTE: The Delta Handle is attached to the shaft but has been
turned under for ease of packing.
Loosen adjustment knob and rotate handle to top of shaft
handle to top of shaft Position handle 6-1/2 to 8-1/2″from
throttle(Fig.1)
Tighten adjustment knob securely.
 DEBRIS SHIELD
Shield Fits snug on shaft. Some force may be
required.
Seat shield (B) onto shaft bracket (C).
Insert bolt (E) and nut (F).tighten securely.
Fig.1
Fig.2A Fig.2B
INSTALLING THE LOWER SHAFT
Pack the aluminum tube into the
connector inside, make the convex
ball aim at the hole on connector
Then turning the knob clockwise until it is tight

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RULES FOR SAFE OPERATION
WARNING DANGER
All models trimmers and brush cutters can throw small stone, metal or small objects as well as
the material being cut. Read these “Rules for Safe Operation” with care.
Follow the instructions in your operator’s manual.
Read the operator’s manual carefully. Be thoroughly familiar with the controls and proper use of
the unit. Know how to stop the unit and shut off the engine. Know how to unhook a harnessed
unit quickly.
Never allow anyone unit without proper instruction. Be sure the operator wears the foot, leg, eye,
face and hearing or thrown objects. Keep the area clear of bystanders, children and pets. Never
allow children to operate or play with the unit.
Do not allow anyone to enter the operating DANGER ZONE with you. The danger zone is an area
15 meters in radius (about 16 paces) or 5 feet.
Insist that persons in the RISK ZONE beyond the danger zone wear eye protection from thrown
objects. If the unit must be used where there are unprotected people, operate at a low throttle
speed to reduce the risk of thrown objects.
Move the stop switch to “o” position when the engine idles, insure it reliable before cutting. Only
may continue to operate the unit when stop switch is in good condition.
Routines for checking that the cutting attachment stops turning when the engine idles.
WARNING DANGER
In addition to head, eye, face and ear protectors shoes to protect your feet improve your
footing on slippery surfaces. Do not wear ties, jewelry, or loose, dangling clothing which
could be caught in the unit.
Do not wear open-toed footwear, or go bare-foot or bare legged. In certain situations you
must wear total face and head protection.
DANGER ZONE
NO PERSON EXCEPT OPERATOR ALLOWED 15 METERS RADIUS DANGER ZONE. EYE,
EAR, FACE, FOOT, LEG AND BODY PROTECTION MUST BE WORN BY OPERATOR.
PERSONS IN ZONE OR RISK BEYOND DANGER ZONE SHOULD WEAR EYE PROTECTION
AGAINST THROWN OBJECTS. RISK DIMINISHES WITH DISTANCE FROM DANGER ZONE.

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CUTTING WITH A NYLON HEAD
For nearly all cutting, it is good to tilt
the line head
so that contact is made on the part of the
circle where the line is moving A W A Y
you and the debris shield. See appropriate)
This results in the debris being thrown A
WAY from you.
Line head rotates in a CLOCK WISE
direction. The CUT-OFF KNIFE will
be on the right side of the debris shield.
WARNING DANGER
Tilting the head to the wrong side will shoot
the debris TOWARDS you. If the line head is
held flat to the ground so that cutting occurs
on the whole line circle, debris will be
THROWN at you, drag will slow the engine
down, and you will use up a lot of line.
WARNING DANGER
Use only quality nylon monofilament line of
the diameter 2 mm. Never use wire or
wore-reinforced line in place of nylon
trimmer line. Load your nylon line cutting
head only with nylon trimmer
WARNING DANGER
Use extreme caution when operating over
bare spots and gravel, because the line can
throw small rock particles at high speeds.
Debris shields on the unit cannot stop objects
which bounce or ricochet off hard surfaces.
WARNIN DANCER
The proper debris shield must be in place
on the unit when nylon cutting line is used,
The cutting line can flap around if too
much line is exposed. Always use the
plastic debris shield with cut-off knife
when using nylon cutting heads.

13
CUTTING WITH A NYLON HEAD
TRIMMING:
This is feeding the trimmer carefully into the material you
wish to cut. Tilt the head slowly to direct debris away from you.
If cutting up to a barrier such as fence, wall or tree, approach
from an angle where any debris ricocheting off the barrier will
fly away from you, Move the line head slowly until the grass is
cut right up the barrier, but do not jam (overfeed) the line into
the barrier. If trimming up to a wire mesh or chain linked fence
be careful to feed only up to wire. If you go to far the line will
snap off around the wire. Trimming can be done to cut through
weed stems one at a time. Place the trimmer line head near the
bottom of the weed-never high up which could cause the weed
to chatter and catch the line. Rather than cut the weed right
through, just use the very end of the line to wear through the
stem slowly.
WARNING DANGER
Do not to use a steel blade for edging or scalping.
SCALPING AND ENGING:
Both of these are done with the line head tilted at a steep angle
Scalping is removing top growth leaving the earth bear.
Edging is trimming the grass back where it has spread
over a sidewalk or drive way. During both edging and
scalping, hold the unit a steep angle and in a position
where the debris, and any dislodging dirt and stones,
will not come back towards you even if it ricochets off
the hard surface. Although the picture shows how to
edge and scalp every operator must find for himself the
angles which suits his body size and cutting situation.
WARNING DANGER
Do not trim in any area where there are strands of
fencing wire. Wear protective safety protecting , Do not
cut where you cannot see what the cutting device is
cutting.

14
FUEL & OIL MIXTURE
 Never fill the fuel tank to the very top.
 Never add fuel to the tank in a closed non-ventilated area.
 Do not add fuel to this unit close to an open fire or sparks.
 Be sure to wipe off spilled fuel before attempting to start engine.
 Do not attempt to refuel a hot engine.
Fuel used for this model is a mixture of unleaded gasoline and approved engine lubricant. When
mixing gasoline with two-cycle engine oil, use only gasoline which contains NO ETHANOL or
METHANOL(Types of Alcohol) Use Branded 89 octane or higher
Unleaded gasoline known to be of good quality. This will help to avoid possible damage to engine
fuel lines and other engine parts.
MIXTURE RATIO IS 4 :1
GASOLINE-4 PART OIL-1 PART
Fuel mixture at the rate other than 25:1 may cause
damage to the engine, Ensure mixture ratio is correct.
FUEL IMPORTANT
The engine uses two-stroke fuel, a mixture Two-stroke fuel may separate. Shake fuel
of gasoline and 2-stroke lubricant 4 :1 container thoroughly before each use. Stored
fuel ages. Do not mix more fuel than you
expect to use within a month.
GASOLINE
Use branded 89 octane or higher unleaded
gasoline known to be of good quality.
FUEL AND OIL MIXTURE
STORING FUEL
Store fuel only in a clean, safe, approved Inspect fuel tank making sure that it is
container. Check and follow local clean and fill with fresh fuel. Use a mixture
ordinances. on type and location of of 4 :1
storage container.

15
PREPARING FOR OPERATIONS
WHEN MIXING GASOLINE WITH TWO CYCLE ENGINE OIL, USE ONLY
GASOLINE WHICH CONTAINS NO ETHANOL OR METHANOL (TYPES OF
ALCOHOL). THIS WILL HELP TO A VOID POSSIBLE DAMAGE TO ENGINE
FUEL LINES AND OTHER ENGINE PARTS.
DO NOT MIX GASOLINE AND OIL DIRECTLY IN THE ENGINE FUEL
TANK.
IMPORTANT: Failure to follow proper fuel mix instructions may cause damage to
the engine.
1. When preparing fuel mixture, mix only the amount needed for the job you are to
do. Do not use fuel that has been stored longer than two months. Fuel mixture
stored longer than this will cause hard starting and poor performance. If fuel mix
has been stored longer than this time. It should be removed and filled with fresh
mixture.
WARNING DANGER
2. Never fill the fuel tank to the very top.
3. Never add fuel to the tank in a closed non-ventilated area.
4. Do not add fuel to this unit close to an open fire or sparks.
5. Be sure to wipe off spilled fuel before attempting to start engine
6. Do not attempt to refuel a hot engine
.
CHECK POINTS BEFORE OPERATION
1. Check for loose bolts. Nuts and fittings.
2. Check the air cleaner for dirt. Clean the air filter of all dirt. Etc. before operation.
3. Check to be sure that protector is securely in place.
4. Check to be sure that is not leak.
WARNING DANGER
The engine exhaust from this product contains chemicals known to
cause cancer, birth defects, or other reproductive harm.

16
OPERATIONS
ENGINE STARTING AND
STOPPING PROCEDURES
STARTING COLD ENGINE
Move the stop switch to “START”
position.
1. Give a gentle push on the primer pump
repeatedly (7-1 times) until fuel comes
into the primer pump.
2. Cold Starts: Pull lever up to close choke.
3. Pull starter handle until engine flash. fires.
4. Push choke lever inwards (excessive cranking with choke lever will cause
flooding engine making it difficult to start).
5. Pull starter handle until engine starts.
6. Allow engine to warm up for a few minutes before using.
STARTING WARM ENGINE
 If fuel tank was not run dry, pull starter. one to three times and should start.
DO NOT USE CHOKE
 If fuel tank was run dry, after refilling repeat steps 3 thru 7 in. STARTING
COLD ENGINE.
STOPPING THE ENGINE
 Move switch to STOP position

17
MAINTENANCE & CARE
AIR FILTER
 Accumulated dust in the air filter will
reduce engine efficiency. Increase fuel
consumption and allow abrasive particles
to pass into the engine. Remove the air
filter as often as necessary to maintain in
a clean condition.
 Light surface dust can readily be removed
by tapping the filter. Heavy deposits
should be washed out in suitable solvent.
 Remove filter cover by loosening air
filter cover knob.
ADJUSTING CARBURETOR
NOTE
Do not adjust carburetor unless necessary.
If you have trouble with the Carburetor,
see your dealer. Improper adjustment
may cause engine damage And void
warranty.
FUEL FILTER
 Fuel tank is fitted with a filter.
Filter is situated at the free end of fuel
pipe and can be picked out through fuel
port with a piece of hooked wire or The
like.
 Check the fuel filter periodically. Do not
allow dust to enter into fuel tank. Clogged
filter will cause difficulty in starting
engine or abnormalities in starting engine
or abnormalities in engine performance.
 When filter is dirty, replace the filter.
 When the inside of the fuel tank is dirty,
it can be cleaned by rinsing the tank out
with gasoline.
CHECK SPARK PLUG
 Do not attempt to remove the plug from a
hot engine in order to avoid possible
damage to the threads.

18
TROUBLE SHOOTING
 Clean or replace the plug if fouled with heavy oily deposits.
 Replace the plug if the center electrode is worn rounded at the end.
 Spark gap .6- .7mm (. 23". 28")
 Fastening torque = 145-155kg.cm (125-135in.lb)
TRANSPORT, HANDLING
 The engine should be turned off when the unit is moved between work areas.
 After the engine has stopped, the muffler is still hot. Never touch hot parts such
as the muffler.
 Confirm that the fuel is not leaked from tank.
EXTENDED STORAGE
 Inspect, clean and repair unit if necessary.
 Remove all fuel from tank.
 Start engine-This will consume all fuel in fuel line and carburetor.
 Remove spark plug and pour one tea spoon of clean motor oil into spark plug
hole of cylinder-replace spark plug.
 Store in clean, dry, dust free area.
FAILURES such as difficulty in starting engine, irregularity in functions and
abnormality in performance can normally be prevented if careful attention is paid to
all operating instructions and maintenance procedures.
Should the engine not function properly, check the following;
 That the fuel system is in good condition and fuel is flowing to the engine.
 The ignition system is in good condition and the spark plug, sparks correctly;
 Compression of the engine is adequate.
FAILURE TO START
 Dispose of fuel in tank.
 Insure that fuel is fresh and clean.
 Check fuel filter to make sure it is clean. (Replace filter if necessary).
 Make sure air filter elements are clean.
 Install new, properly gapped spark plug.
 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.

19
TROUBLESHOOTING GUIDE
1. FAILURE TO START
symptom probable cause remedy
cylinder
compress
pressure
normal
spark
plug
spark
normal
fuel
system
abnormality
these is no fuel in tank
fuel filter obstruct
Add fuel in tank
Clean fuel filter
fuel
system
normal
fuel
fuel is too dirty
there is water in fuel
there is too much
mixture ratio is improper
instead fuel
instead fuel
tear down spark plug
and dry it
mixture peroration
fuel
system
normal
high
voltage
wire
spark
normal
spark
plug
spark plug fouled with oily
deposits
Spark plug insulation damage
Spark gap is too large or small
clean the oil deposits
replace spark plug
adjust spark gap .6- .7mm
high
voltage
spark
abnormality
high voltage wire breach
or break off
coil looseness
replace or tighten
tighten
fuel
system
normal
Ignition
System
normal
compress
press
is
shortage
piston ring attrite
piston ring is broken
piston ring cementation
spark plug looseness
conjoint surface of the
cylinder and crank cast leak
replace a new
replace
eliminate
tighten
eliminate
Compress
normal
High voltage wire and spark
Plug contact badness
Stop switch failure or short
circuit
tighten the spark plug cap
repair or replace

2
TROUBLESHOOTING GUIDE
2. LOW OUTPUT
symptom probable cause remedy
flameout when speedup
the smoke is thin,
carburetor spout backward
fuel filter obstruct,
fall short of fuel
muffler fouled with oily deposits
clean fuel filter 、 clean fuel road 、
adjust carburetor
clean the oily deposits
compress press is shortage piston
、 piston ring 、
cylinder attrite 、
replace piston 、 piston ring
engine leak Conjoint surface of the
Cylinder and crank cast leak
repair
the end of two crank shaft leak the seal is bad replace seal
engine overheats
burning room fouled with
oily deposits
avoid use it for long time 、
high speed and heavy load
clean the oily deposits
3. ENGINE RUNNING UNSTABLE
symptom probable cause remedy
there are metal knock sound piston
、 piston ring 、
cylinder attrite 、
piston pin 、 piston attrite
bearing of crank shaft attrite
replace piston 、 piston ring
replace piston pin 、 piston
replace bearing
there are metal knock sound engine overheats
burning room fouled with
oily deposits
gasoline branded is unfit
avoid use it for long time 、
high speed and heavy load clean
the oily deposits
replace require branded octane
engine ignition break off there is water in fuel
spark gap is wrong
coil gap is wrong
instead fuel
adjust spark gap .6- .7mm
adjust coil gap .3- .4mm
4. THE ENGINE SUDDENLY STOPPED
probable cause remedy
fuel is use up
spark plug fouled with oily deposits and short
circuit
high voltage wire fall off
add fuel
clean the oily deposits
connect