10.
MAINTENANCE
and
STORING
/"
The following maintenance jobs apply when the engine is operated correctly under normal conditions. The indicated main-
tenance intervals are by
no
means guarantees for maintenance free operations during these intervals. For example,
if
the
engine is operated in extremely dusty conditions, the air cleaner should be cleaned every
day,
instead
of
every
50
hours.
10-1
DAILY CHECKS
and
MAINTENANCE
1)
Remove dust from whatever which accumulated dust.
2)
Check external fuel leakage. If any, retighten or replace.
3)
Check screw tightening. If any loose one is found, retighten.
10-2
EVERY
50
HOURS CHECKS
and
MAINTENANCE
1)
Check spark plug. If contaminated, wash in gasoline or polish with emery paper.
2)
Clean air cleaner.
10-3
EVERY
150
HOURS CHECKS
and
MAINTENANCE
1)
Clean fuel strainer and fuel tank.
2)
Clean contact breaker points.
3)
Clean exhaust port
of
cylinder and both inlet and outlet
of
muffler.
10-4
YEARLY CHECKS
and
MAINTENANCE
1)
Remove carbon from cylinder head and piston head.
2)
Clean fuel tank inside.
3)
Clean carburetor diaphragm chamber inside. (In type
A,
float chamber inside)
4)
Clean contact breaker and adjust point gap.
5)
Replace fuel line once a year.
10-5
PREPARATION
for
LONG ABEYANCE
1)
Perform the above
9-1
and
9-2
maintenance jobs.
2)
Drain fuel from the fuel tank and carburetor float chamber. (In case type
R
with diaphragm carburetor, run the engine
until
it
stops from lack
of
fuel.)
3)
Remove spark plug, and apply
5
to lOcc
of
lubricating oil through the spark plug hole. Perform idle operation several
times
by
pulling the recoil starter handle slowly. Re-install the spark plug.
4)
Clean the engine outside with oiled cloth.
5)
Put a vinyl or other cover over the engine and store the engine in dry place.
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