Honda BF8A Owner's Manual page 58

SERVICING YOUR HONDA OUTBOARD MOTOR
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Disconnect the fuel tank line from the motor.
Remove the engine cover, and remove the fuel filter. Before removing the
filter, place clamps on the fuel tubes on each side of the filter to prevent fuel
leakage.
Install the new fuel filter with the arrow mark pointing toward the carburetor.
Fuel flow will be impeded if the filter is installed backward.
FUEL FILTER
If loss of power or hard starting is found to be caused by excessive water
or sediment accumulated in the fuel filter, inspect the fuel tank. Clean the
fuel tank if necessary.
Remove the clamps used to close the fuel tubes. Connect the fuel tank line
to the motor. Turn the fuel tank vent knob counterclockwise to the open
position, pump the primer bulb, and check for leaks.
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