Honda BF4A Owner's Manual page 38

OPERATION
OPEN
VENT KNOB
1. Fill the tank to the maximum fuel
level (p.69).
2. Turn the internal fuel tank vent
knob counterclockwise to the open
position (p. 21).
FUEL VALVE
LEVER
36
[BF4A]
[BF5D and BF6A]
ON (BF4A)
or
INTERNAL
INTERNAL
FUEL TANK
FUEL TANK
POSITION
POSITION
(BF5D and
BF6A)
3. Turn the fuel valve lever to the ON
position (BF4A) or internal fuel
tank position (BF5D and BF6A)
(p. 19).
ON
N (neutral)
GEARSHIFT
LEVER
[USA model]
N (neutral)
[Canadian model]
N (neutral)