17
Check the condition of left crankcase cover and
replace if necessary.
Troubleshooting of crankcase, please refer to the following table.
Description
Problem
Trouble
Consequences
Correction
Crankcase
Crack in the crank case
Oil leakage from the
crankcase
Repair or replace
the crankcase
Oil leakage from the
joint of left and
right crankcase
The crankcase gasket is
worn out
Replace the gasket
The threaded hole of
oil drain plug screw is
ineffective
Oil leakage from the
threaded hole of
plug screw
Repair of replace
the crankcase
The threaded holes
of cylinder bolt are
ineffective
Cylinder head retaining
nut is impossible to
screw up firmly,
resulting in air leakage
between the cylinder
head and cylinder
The engine starts hard
or fails to start.
Insufficient engine
output; Engine speed
changes during idle run
Repair the threaded
or replace the
crankcase
The bolt of the
cylinder is broken
The same as front
The same as front
Replace the cylinder bolt
