SERVICE PROCEDURE
PERFORM SERVICE AT INTERVALS INDICATED
(X)
EACH
DAY
CHECK OIL LEVEL
(maintain in safe operating range)
--
-
-
X
CLEAN AIR INTAKE SCREEN (plus other external surfaces)
- X
REPLE NISH FUEL SUPPLY (Use clean, fresh fuel)
-
-
-
-
-
-
-- -
X
CHANGE OIL
(Use API Service MS of proper weight)
---
-
-
-
-
-
---
SERVICE FUEL FILTER
(remove and clean sediment bowl)
-
---
-
-
SERVICE AIR CLEANER
(per i nstructi ons - P age
3) -
-
--
--
-
-
-
-
-
CHECK AIR CLEANER ELEMENT
(dry type only)
-
-
-
-
---
-
---
- ----
-
-
SERVICE SPARK PLUG
(gap
.025"
for gasoline) ----------
--
-
-
-
SERVICE BREAKER POINTS
(gap
.020"
)
-
-
-------
-
-
---
-
-
-
-
- ----
-
EVERY
25
HOURS
----
X
--
-
- X
-
-
-
- X
--
-
-------
------
-
-
-
--
-
-
-
--
--
-
EVERY
EVERY
EVERY
50
HOURS
100
HOURS
500
HOURS
--
-
X
---�-----
---- X
-
-
-
---
-
-
-
---
---
-
---
---- X
NOTE: I ntervals stated ar� for good, clean operating conditions--perform services more frequently if
dusty or dirty condltions prevail.
PREVENTATIVE MAINTENANCE
In addition to the routine services listed above, there are other
important preventative maintenance steps that should be taken to keep engine in top condition. Usually,
the tools and instruments required for these additional steps are not available to the engine owner. For
this reason, the engine should be returned periodically to an authorized Se�vice Center for complete
servicing and tune-up. The benefits of such service will not only be noted immediately in improved
performance but, most important, in continued satisfactory operation during a long, trouble free,
service life.
LUBRICATING OIL
Oil
Check daily to make sure level is between L and F marks--level must not exceed "F" mark.
Oil
Change oil after first
5
hours of operation on new engineuthereafter change at
25
hour
intervals or more often in severe conditions.
Oil Type: Use only detergent type oils with API Service MS classification. See Temperature-Viscosity
Guide
cover) for proper weight. Special
are not required for new engines, however, place
engine under load immediately as this promotes final seating of the rings.
AIR CLEANER
Dry Type: Every
50
hours, service by tapping element lightly against flat surface to remove loose
dirt--do not clean in any liquid or with compressed air. Replace element after
100
hours--this can be
extended up to
200
hours if good clean operating conditions prevail. Use only
parts
when replacing element.
Oil Bath Type: Service at least every
25
hours. To service, swish element in solvent--do not dry
with air hose. Lightly re-oil element after
Drain and clean bowl then add new oil (same
weight and grade as engine) to OIL LEVEL mark. After reinstalling serviced parts, place copper
washer on cover then secure wing nut "finger tight".
COOLING SYSTEM
Keep air intake screen and cooling fins clean at all times. Do not operate engine with blower hous
ing or cooling shrouds removed as this will also cause overheating due to improper air circulation.
IGNITION SYSTEM
Spark
Every
100
hours remove plug and check condition. Good operating conditions are indicated
if plug has light coating of gray or tan deposit. A dead white, blistered coating could indicate overheat
ing. A black (carbon) coating may indicate an"overrich'fuel mixture caused by clogged air cleaner or
improper carburetor adjustment. Do not sandblastJ, wire brush, scrape or otherwise service plug in
poor condition--best results are obtained with new plug. Set spark gap to
.025"
(or.
018"
for gas fuels,
.020"
on radio shielded plugs). Tighten plug to
324
in. lbs. torque when installing.
Breaker Points: Every
500
hours breaker points should be inspected and serviced. If oxidized, dirty
or oily,
with coarse cloth--do not use emery cloth or sandpaper. Slightly pitted points can be
dressed with point file--replace badly pitted or burned points. The gap must be adjusted after points
are serviced or replaced since this setting establishes ignition timing. To adjust, turn engine over by
hand until points are at maximum opening--check with feeler gauge. If gap is not
..
020",
loosen adjust
ing screw then shift movable plate until
.
020"
gap is obtained. After retightening screw, check to make
sure proper gap is present when points are full open.
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