Honda Marine BF135A Owner's Manual page 88

STORAGE
You can extend fuel storage life by
adding a gasoline stabilizer that is
formulated for that purpose, or you
can avoid fuel deterioration problems
by draining all the fuel from the fuel
tank and vapor separator.
The Distributor's Limited Warranty
(p. 114 ) does not cover fuel system
damage or engine performance
problems resulting from neglected
storage preparation.
86
Adding a Fuel Stabilizer
When adding a fuel stabilizer, fill the
fuel tank with fresh gasoline. If only
partially filled, air in the tank will
promote fuel deterioration during
storage. If you keep an additional
container of gasoline for refueling,
be sure that it contains only fresh
gasoline.
1. Drain the vapor separator before
adding fuel stabilizer.
2. Add fuel stabilizer following the
manufacturer's instructions.
3. After adding a fuel stabilizer, run
the engine in water for 10 minutes
to be sure that the treated gasoline
has replaced the untreated gasoline
in the vapor separator.
4. Turn the engine OFF.
Draining the Fuel System
You can avoid fuel deterioration
problems by draining the fuel tank
and vapor separator.
FRONT BRACKET CLAMP
DRAIN SCREW
VAPOR SEPARATOR
DRAIN HOSE
(Draining the fuel becomes easier
when the front end of the drain
hose is as low as possible)