17.
MAINTENANCE
and
STORING
&
me 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.
17-1 DAILY CHECKS and MAINTENANCE
-
I
Checks and maintenance
I
Reasons for requiring them
I
Remove dust from whatever parts which
accumulated dust.
The governor linkage
is
especially susceptible to dust.
I
Check external fuel leakage. If any, retighten
or
replace.
Not
only
wasteful but also dangerous
Check screw tightening. If
any
loose one
is
found,
If
the engine
is
operated without sufficient
oil,
it
will
Check
oil
level in crankcase and add up as necessary.
accidents.
re-tighten.
Loose
screws and nuts
will
result
in
vibration
17-2 EVERY
20
HOURS CHECKS
and
MAINTENANCE
I
I
1
Checks and maintenance
Reasons for requiring them
Change crankcase
oil.
To
remove run-in wear particles
17-3 EVERY
50
HOURS (10 DAYS) CHECK and MAINTENANCE
Checks and maintenance
Reasons for requiring them
Change crankcase
oil.
gasoline
or
polish
with
emery paper.
Output power is reduced and starting
Check spark plug.
If
contaminated, wash in
Clogged
air
cleaner harms engine operation.
Clean
air
cleaner.
Contaminated
oil
accelerates wear.
is
made difficult.
17-4 EVERY 100
-
200
HOURS (MONTHLY) CHECKS
and
MAINTENANCE
I
Checks
and
maintenance
I
~~ ~ ~~~
Reasons for requiring them
I
Clean fuel filter and fuel tank.
1
The engine
will
be out
of
order.
I
Clean contact breaker points.
The engine output drops.
-
65
-
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