13.
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.
13-1
DAILY CHECKS and MAINTENANCE
Checks and maintenance
I
Reasons for requiring them
Remove dust from whatever parts which
accumulated dust.
The governor linkage is especially susceptible to dust.
Check external fuel leakage. If any, retighten or
replace.
Not only wasteful but also dangerous
Loose screws and nuts will result
in
vibration
Check screw tightening. If any loose one is found,
I
re-tighten.
1
accidents.
Check oil level in crankcase and add up as necessary.
If
the engine
is
operated without sufficient oil,
it
will
I
fail.
13-2
EVERY
20
HOURS CHECKS and MAINTENANCE
Checks and maintenance Reasons for requiring them
1
I
Change crankcase
oil.
1
TO
remove run-in wear particles
I
13-3
EVERY
50
HOURS
(10
DAYS) CHECK and MAINTENANCE
Checks and maintenance Reasons for requiring them
Change crankcase
oil.
Contaminated
oil
accelerates wear.
I
Clogged air cleaner harms engine operation.
~____
1
Check spark plug. If contaminated, wash in
1
Output power is reduced and starting
gasoline or polish with emery paper.
is made difficult.
13-4
EVERY
100-
200
HOURS (MONTHLY) CHECKS and MAINTENANCE
I
Checks and maintenance
Reasons for requiring them
1
Clean fuel filter and fuel tank.
The engine output drops.
Clean contact breaker points.
The engine will be out
of
order.
-43
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