Honda BF4A Owner's Manual page 92

TAKING CARE OF UNEXPECTED PROBLEMS
ENGINE WILL NOT START
Possible Cause
Out of fuel.
Fuel valve lever is not turned to the appropriate position.
Fuel vent closed (internal fuel tank).
When using the portable fuel tank (BF5D and BF6A), fuel
vent closed (portable fuel tank).
When using the portable fuel tank (BF5D and BF6A), fuel
hose not primed.
Fuel filter or fuel tank filter restricted.
Bad fuel; outboard motor stored without treating or
draining gasoline, or refueled with bad gasoline.
Spark plug faulty, fouled, or improperly gapped.
Spark plug wet with fuel (flooded engine).
Carburetor malfunction, fuel pump failure, ignition
malfunction, stuck valves, etc.
90
Refuel (p. 69).
Turn the fuel valve lever to the appropriate position
(p. 19).
Turn the internal fuel tank vent knob counterclockwise to
the open position (p. 21).
Turn the portable fuel tank vent knob counterclockwise to
the open position (p. 26).
Squeeze priming bulb (p. 38).
Replace restricted f ilters (p. 73 or 75).
Drain fuel tank and carburetor (p. 83). Ref ill with fresh
gasoline (p. 69).
Adjust the spark plug electrode gap or replace spark plug
(p. 68).
Dry and reinstall spark plug. Start engine with choke and
throttle open.
Take outboard motor to an authorized Honda Marine
dealer, or refer to the shop manual.
Correction