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4. MAINTENANCE
4.5 300 HOUR SERVICE
Perform a complete 50 hour service
plus the following.
4.5A Fuel Filter.
Change the engine fuel filter after the
first 50 hours and every 300 hours there-
after. Use only Thomas approved filters.
1. Shut off the fuel line petcock located at
the fuel tank (T90100). Turn clock
wise to close.
2. Use a filter wrench and remove the
fuel filter.
3. Lubricate the new fuel filter’s gasket
with clean light oil. Do not use grease.
4. Turn on until gasket contacts the
adapter base. Hand tighten an addition-
al 1/2 to 3/4 turn.
5. Open the fuel line shut off at the fuel
tank (T90100).
6. Open the air bleed screw on the fuel
filter housing (T90095).
7. Close the bleed screw when fuel
begins to trickle out.
8. Open the air bleed screw on the engine
(T90095).
9. Start the engine and operate for two to
three minutes before closing the air
bleed screw.
10. If the engine fails to continue to oper-
ate, repeat the air bleed procedures
steps 5 ~ 9.
T90095
Fuel Filter
T90100
Fuel line shut off
Air Bleed Screw
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