Remove the crankcase breather, if it is mounted on
the flywheel housing, every 1,000 hours or 30,000 miles
(48 280 km) and wash the steel mesh pad in fuel oil
and dry it with compressed air. This cleaning period
may be reduced or lengthened according to severity of
Clean the internally mounted breather pads at time of
engine overhaul, or sooner if excessive crankcase
pressure is observed.
Clean the breather cap, mounted on the valve rocker
cover, in clean fuel oil every time the engine oil is
Inspect the blower screen and gasket assemblies (if
used) every 1,000 hours or 30,000 miles (42 280 km)
and, if necessary, clean the screens in fuel oil and dry
them with compressed air. Reinstall the screen and
gasket assemblies with the screen side of the
assemblies toward the blower. Inspect for evidence of
blower seal leakage.
With the engine running, check for flow of air from
the air box drain tubes every 1,000 hours or 30,000
miles (48 280 km). If the tubes are clogged, remove,
The electrical starting motor is lubricated at the time
clean and reinstall the tubes. The air box drain tubes
of original assembly. Oil can be added to the oil wicks,
should be cleaned periodically even though a clogged
which project through each bushing and contact the
condition is not apparent. If the engine is equipped
armature shaft, by removing the pipe plugs on the
w i t h an air box drain tank, drain the sediment
outside of the motor. The wicks should be lubricated
whenever the starting motor is taken off the engine or
The Sprag overrunning clutch drive mechanism should
be lubricated with a few drops of light engine oil
whenever the starting motor is overhauled.
bushings with 5 or 6 drops of engine oil at the hinge
cap oiler every 200 hours or 6,000 miles (9 656 km).
while others use sealed bearings. In these latter two
cases, additional lubrication is not necessary.