Honda BF75A Owner's Manual page 132

TROUBLESHOOTING
Engine starts but immediately stops.
Engine sometimes stops while cruising.
Fuel
No gasoline in fuel tank.
There is gasoline
in fuel tank.
132
Water is mixed
with gasoline.
Vent knob is not
open or vent is
clogged.
Fuel filter is
clogged.
Air screw is open
too wide.
Idling speed is too
slow.
Carburetor vent is
clogged.
Fuel pump (s) is
(are) faulty.
Air in fuel pump.
Air enters through
fuel line connector.
Air enters through
primming bulb.
Engine overheats
Normal sparking
Water intake
screens are clogged.
Spark plug is not of
specified rating.
Water pump is
faulty.
Thermostat is
clogged.
Thermostat is
faulty.
Water tube or
passage is clogged.
Exhaust gas is
entering cooling
system.