Fuel Requirements; Gasoline; Muddy Or Acidic Water; Anti-Fouling Paint - Yamaha F250B Owner's Manual

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Fuel requirements

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Gasoline

Use a good quality gasoline that meets the
minimum octane rating. Yamaha recomends
that you use alcohol-free (see Gasohol) gas-
oline whenever possible.
Recommended gasoline:
Premium unleaded gasoline with a
minimum octane rating of 94 (Re-
search Octane Number).
ECM01981
NOTICE
Do not use leaded gasoline. Leaded gas-
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oline can seriously damage the engine.
Avoid getting water and contaminants in
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the fuel tank. Contaminated fuel can
cause poor performance or engine dam-
age. Use only fresh gasoline that has
been stored in clean containers.
Gasohol
There are two types of gasohol: gasohol con-
taining ethanol (E10) and that containing
methanol. Ethanol can be used if the ethanol
content does not exceed 10% and the fuel
meets the minimum octane ratings. All etha-
nol blends containing more than 10% ethanol
can cause fuel system damage or cause en-
gine starting and running problems. Yamaha
does not recommend gasohol containing
methanol because it can cause fuel system
damage or engine performance problems.
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Muddy or acidic water

Yamaha strongly recommends that you have
your dealer install the optional chromium-plat-
ed water pump kit if you use the outboard mo-
tor in muddy or acidic water conditions.
However, depending on the model it might not
be required.
Specifications and requirements
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A clean hull improves boat performance. The
boat bottom should be kept as clean of marine
growth as possible. If necessary, the boat bot-
tom can be coated with an anti-fouling paint
approved for your area to inhibit marine
growth.
Do not use anti-fouling paint which includes
copper or graphite. These paints can cause
more rapid engine corrosion.
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Motor disposal requirements

Never illegally discard (dump) the motor.
Yamaha recommends consulting the dealer
about discarding the motor.
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Keep the following items onboard in case
there is trouble with the outboard motor.
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Consult your Yamaha dealer for details.

Anti-fouling paint

Emergency equipment

A tool kit with assorted screwdrivers, pliers,
wrenches (including metric sizes), and
electrical tape.
Waterproof flashlight with extra batteries.
An extra engine shut-off cord (lanyard) with
clip.
Spare parts, such as an extra set of spark
plugs.
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