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WARNING
EN
• When testing the spark plug, never hold the high voltage wire of the spark plug with
wet hand.
• Make sure there is no spilled fuel outside the engine and that the spark plug isn't dipped with
fuel.
• To prevent fi re, keep sparks far away from the spark plug mount hole.
Having fulfi lled all the check items above, if the engine still fails to work, contact your dealer for help.
II. LOW GASOLINE ENGINE POWER OUTPUT
TROUBLE
When turning
throttle greater,
speed increase
responds slow-
ly or speed is
decreased even
engine stops.
III. GASOLINE ENGINE CANNOT RUN SMOOTHLY
TROUBLE
Engine
is
Piston, cylinder or piston ring is worn excessively.
pinking.
Piston pin and piston pin hole are worn excessively.
Tie rod small head is worn excessively.
Roller bearing for crankshaft main shaft is worn.
Abnormal com-
Engine is too hot.
bustion.
Too much carbon fouling in combustion chamber.
Improper gasoline brand or low gasoline quality. Replace with qualifi ed gasoline.
Engine cannot
There is water in fl oater room.
start because of
Improper spard plug electrodes clearance.
spark lacking.
Incorrect ignition time.
Something wrong with induced coil, and so on.
38
CAUSE
Ignition sys-
Incorrect ignition time.
tem.
Fuel supply
Air in fuel line of fuel line clogged. Exhaust air or dredge fuel line.
system.
Main jet is not adjusted properly.
In carburetor, needle valve hole
and main jet clogged.
Fuel cock is clogged up.
Too much carbon fouling in com-
busting chamber.
Air cleaner is clogged up.
Intake pipe is leaking.
Poor com-
Piston or cylinder or piston ring
pression.
is worn.
Air leakage from the surface by
which cylinder block contacting
with cylinder head.
Too big or too small valve clear-
ance.
Valve tightness is poor.
CAUSE
REMEDY
Readjust ignition advance angle.
Readjust.
Clean and blow to get through.
Clean, replace damage part.
Clear away.
Clean fi lter element.
Replace or replace it.
Replace it with a new one.
Replace cylinder gasket.
Adjust it.
Repair.
REMEDY
Replace the worn.
Replace piston or piston pin.
Replace tie rod.
Replace roller bearing.
Shoot trouble.
Clear away.
Clean.
Adjust.
Readjust.
Check and replace damaged parts.
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