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Critical Maintenance Schedule
Maintenance Items
Operational Hours
200
500
Inspect Magneto Breaker Points
X
Clean Commutator
xl
Check Brushes
x2
Clean Generator
X
Grind Valves
X
xl Perform more often in extremely dusty conditions.
x2 Replace brushes when worn to 7/16 inch or less.
Owner Maintenance Schedule
Maintenance Items
Daily
Operational Hours
4
25
50
100
Inspect Unit
X
Check Fuel
X
Check Oil Level
X
Clean Air Cleaner
xl
Change Crankcase Oil
xl
Clean Governor Linkage
xl
Check Spark Plug
X
Clean Crankcase Breather
X
xl
Perform more often in extremely dusty conditions.
When adding oil between changes, alwaysuse
the same brand that is in the crankcase.
Various brands of oil may not be compatible
when mixed. Ambient temperatures must be
the guide for selection of the proper weight
oil. Following are recommendations:
Above 32 F — use SAE 30
Below 32 F - use SAE 10W
Use a good quality, heavy duty oil with the
API (American Petroleum Institute) designa¬
tion SE or SE/CC. Don't use an oil with the
designation CD unless it is also designated SE
and the oil manufacturer certifies it will per¬
form satisfactorily in gasoline engines.
Note: If oils with these designations are not
yet available, use an oil with the API designa¬
tion MS, MS/DG or MS/DM which has passed
all the Automotive Manufacturer's Sequence
Tests and the MIL-L-2104B Tests.
Air Cleaner
The polyurethane type air cleaner (B) must
normally be cleaned every 25 hours, more
often if the engine runs rich and emits black,
smoky exhaust due to clogged air cleaner
element. To service the air cleaner, remove
the air cleaner cover. Then remove the poly¬
urethane element and wash in a detergent and
water
solution
as you would a sponge.
Squeeze out the cleaning solution and re-oil
the element by applying generous amounts of
oil to the sides and open ends. Squeeze to
distribute the oil and remove excess oil.
Reinstall the element and air cleaner cover.
Crankcase Breather
To remove the crankcase breather assembly
(located behind cylinder intake pipe), take
out the fastening screws and lift off the
breather assembly. The breather has the filter¬
ing element held in the cover by a small barb.
Depress the element with a blade between the
element and
cover.
Once the element is
loosened from the barb, the element can be
removed from the cover.
Clean the element with a suitable solvent or
household detergent. Blow out the solvent or
cleanser used with low pressure air. When
re-installing the breather assembly, the drain
hole or rectangular opening is at the bottom.
Note: The filtering element doesn't have to be
lubricated before re-installing because it's
lubricated by crankcase vapors during opera¬
tion.
Ignition
Every 100 hours, remove, inspect, clean and
regap the spark plug to .020". If the plug
looks discolored or has fouled, replace it.
Because the plug used is a special length plug
for installation, use the same plug type as the
original or equivalent.
59
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