Instructions / Assembly

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2. GASOLING ENGINE POWER OUTPUT INSUFFICIENCY:
TROUBLE CAUSE REMEDY
When increasing throttle, speed increase slow or even
decrease and stop running
Fuel supply system
Air in fuel line or fuel line clogged Exhaust air or dredge fuel line
Main oil ow hole is not adjusted properly Readjust
In carburetor, needle valve hole and main
oil ow hole clogged.
Clean and blow to get through
Fuel cock is clogged up. Clean, replace damaged part
Too much carbon deposit in combusting
chamber.
Clear away
Too much car bon fouling in muffler and
exhaust pipe.
Clear away
Air cleaner is clogged up. Clean air cleaner lter element
Intake pipe is leaking Repair or replace
Poor compression
Piston or cylinder or piston ring is worn Replace the worn
Air leakage from the surface by which cyl-
inder block contacting with cylinder head.
Replace cylinder gasket
Too big or too small valve clearance. Readjust
Valve tightness is poor. Repair
3. GASOLINE ENGINE RUNNING UNSMOOTHLY:
TROUBLE CAUSE REMEDY
Knocking sound
Piston, cylinder or piston ring is worn exces-
sively.
Replace the worn
Piston pin and piston pin hole are worn exces-
sively.
Replace piston or piston pin
Tie rod small head is worn excessively. Replace tie rod
Roller bearing for crankshaft main shaft is
worn.
Replace roller bearing
Abnormal
combustion
Engine is too hot Shoot trouble
Too much carbon deposit in combustion chamber Clear away
Improper gasoline brand or low gasoline quality Replace with qualied gasoline
Spark
lacking
There is water in oat chamber Clean
improper spark plug electrodes clearance Adjust
Something wrong with induced coil, and so on Check and replace damaged parts
TROUBLESHOOTING