18
DR
®
5.8 HP ENGINE
6. ABNORMAL NOISES WHEN ENGINE IS 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 be
atin
g
sound
when
abnorm
al
combustion
o
ccurs
Too much carbon deposit in combustion chamber
Clear away carbon deposit
Too small electrode clearance of spark plug
Adjust electrode clearance properly
Too much fuel supplied to engine
Check relative parts such as carburetor
Improper fuel brand
Replace fuel
Engine is overheated
Find the cause for overheating and eliminate it
Oth
er
problems
Improper valve clearance
Readjust valve clearance properly
Flywheel is not connected with crankshaft tightly
Connect tightly
