Instructions / Assembly

6. THERE EXISTS ABNORMAL NOISE WHEN ENGINE RUNNING

TROUBLE CAUSE REMEDY

Beating sound

Piston, piston ring or cylinder is worn Replace the worn part

Connection rod or piston pin and piston pin

hole are worn

Replace the worn part

Crankshaft main neck is worn Replace bearing

Piston ring is broken Replace piston ring

Metal beating sound when

abnormal combustion occurs

Too much carbon deposit in combusting

chamber

Clear away carbon deposit

Too small electrode clearance of spark plug

Adjust electrode clearance prop-

erly

Engine fuel is too much

Check relative parts such as car-

buretor

Improper fuel brand Replace fuel

Engine is overheat Find a cause and eliminate it

The other

Improper valve clearance

Readjust valve clearance prop-

erly

Fly wheel is not connected with crankshaft

tightly

Connect tightly

TROUBLESHOOTING