Honda BF5A Owner's Manual page 37

Fuel filter replacement
The fuel filter is located between the fuel pump and the carburetor. Water
or sediment accumulated in the fuel filter can cause loss of power or hard
starting. To prevent engine malfunction, replace the fuel filter regularly.
(SERVICE PERIOD) Every 200 operating hours or every one year
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Gasoline is extremely flammable and explosive under certain conditions.
Do not smoke or allow flames or sparks near the outboard motor while
draining fuel.
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Always work in a well-ventilated area.
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Be sure that any fuel drained from the outboard motor is stored in a
safe container.
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Be careful not to spill fuel when replacing the filter. Spilled fuel or fuel
vapor may ignite. If any fuel is spilled, make sure the area is dry before
starting the engine.
1 .Disconnect the fuel tank line from the motor.
2. Remove the engine cover, and remove the fuel filter.
3.lnstall the new fuel filter with the arrow mark pointing toward the
carburetor.
NOTE:
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Before removing the filter, place clamps on the fuel tubes on each side of
the filter to prevent fuel leakage.
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Fuel flow will be impeded if the filter is installed backward.
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