VI.
THERE IS AN ABNORMAL NOISE WHEN THE MOTOR IS RUNNING
There is a beating
noise
Metallic noise can be
heard when the burn
is incorrect!
Incorrect valve lash
The flywheel is not connected properly to the crankshaft
PROBLEM
The piston, piston ring or cylinder are
worn
Worn rod or piston pin and piston pin
bore
The main crankshaft bearing is worn
The piston ring is damaged
Too much carbon deposit in the
combustion chamber
Lash for the park plug electrode is too
little
Engine flooded with fuel
Incorrect fuel mixture
The engine is excessively hot
PROBLEM
CAUSE
Replace
Replace
Replace
Replace
Remove the carbon deposit.
Correctly adjust the gap between
the electrodes
Check the nearest parts, such as
the carburetor
Change fuel
Find the cause and eliminate it
CAUSE
Adjust valve lash correctly
Correct connection
SOLUTION
SOLUTION