- Honda Tiller Owner's Manual

For storage of a month or longer, perform these additional steps:
3. Fill the fuel tank with fresh gasoline, and add a gasoline conditioner, such
as HONDA FUEL STABILIZER, which is formulated to extend fuel storage
life.
Be sure the fuel tank is completely filled. If partially filled, air in the tank will
promote fuel oxidation and deterioration, resulting in bad fuel that may
cause hard starting. Deteriorated fuel may also clog carburetor passages,
requiring carburetor repair or replacement.
Fuel oxidation problems can also be prevented by completely draining the
fuel tank and carburetor. Carburetor draining is recommended if storage
time will exceed two months. However, a drained fuel tank may rust from
the effects of moisture condensation. It is best to leave the fuel tank
completely filled, unless you are preparing the tiller for shipment or other
special circumstances.
NOTE:
The Distributor’s Limited Warranty does not cover fuel system damage of
engine performance problems resulting from neglected storage prepara-
tion.
If storage time will not exceed two months, it is not necessary to drain the
carburetor. Add gasoline conditioner before starting the engine (page 54,
step 1) ; that will ensure that treated gasoline replaces the untreated
gasoline in the carburetor.
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