17
when it is
serious
Combustion-chamber deposit
Clear carbon deposit
Carbon deposit in the muffler and
exhaust pipe
Clear carbon deposit
Blockage of air filter
Clean filter element
Leakage of air intake system
Repair or replace
Poor
compression
Wear of piston, cylinder and piston
ring
Replace worn parts
Valve clearance is excessive
(excessive little)
Readjust
Valve seal is not sealed tightly
Repair
⚫
Cylinder pressure inspection
Please send to the authorized dealer of the Company for repair.
4-1-3 Unstable speed
Phenomenon
Cause
Remedy
There is
knocking noise
in gasoline
engine
Excessive wear of piston, cylinder and
piston ring
Replace worn parts
Excessive wear of piston pin and pin hole
Replace the piston or piston pin
Excessive wear of small end of
connecting rod
Replace the connecting rod
Deflagration
Gasoline engine overheating
Find the cause and eliminate
Combustion-chamber deposit
Clear carbon deposit
Unqualified gasoline
Replace qualified gasoline
Misfire of
gasoline engine
There is water in float chamber
Clean the float chamber
Electrode clearance of spark plug is
improper
Adjust electrode gap
Ignition coil failure, etc.
Check and replace damaged parts
Cylinder
pressure gauge
