Fuel Requirements; Gasoline; Anti-Fouling Paint - Yamaha F2.5A Owner's Manual

Recommended engine oil grade 1
SAE
-4 14 32 50
-20 -10 0 10
10W–30
10W–40
5W–30
Recommended engine oil grade 2
SAE
-4 14 32 50
-20 -10 0 10
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Fuel requirements

EMU40202

Gasoline

Use a good quality gasoline that meets the
minimum octane rating. If knocking or ping-
ing occurs, use a different brand of gasoline
or premium unleaded fuel.
Recommended fuel:
Regular unleaded gasoline
Min. research octane number (RON):
90
ECM01982
NOTICE
 Do not use leaded gasoline. Leaded
gasoline can seriously damage the en-
gine.
Specifications and requirements
68 86 104 122˚F
20 30 40 50˚C
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68 86 104 122˚F
20 30 40 50˚C
15W–40
20W–40
20W–50
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 Avoid getting water and contaminants in
the fuel tank. Contaminated fuel can
API
cause poor performance or engine dam-
age. Use only fresh gasoline that has
SE
been stored in clean containers.
SF
SG
Gasohol
SH
There are two types of gasohol: gasohol con-
SJ
SL
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. E85 is a
fuel containing 85% ethanol and must not be
API
used in your outboard motor. All ethanol
blends containing more than 10% ethanol
can cause fuel system damage or cause en-
gine starting and running problems. Yamaha
SH
SJ
does not recommend gasohol containing
SL
methanol because it can cause fuel system
damage or engine performance problems.
It is recommended that you install a water-
separating marine fuel filter assembly (10 mi-
cron minimum) between your boat's fuel tank
and outboard motor when using ethanol. Eth-
anol is known to allow moisture to be ab-
sorbed into boat fuel tanks and systems.
Moisture in the fuel can cause corrosion of
metallic fuel system components, starting
and running complaints and require addition-
al fuel system maintenance.
EMU36331

Anti-fouling paint

A clean hull improves boat performance. The
boat bottom should be kept as clean of ma-
rine growth as possible. If necessary, the
boat bottom can be coated with an anti-foul-
ing paint approved for your area to inhibit ma-
rine growth.
Do not use anti-fouling paint which includes
copper or graphite. These paints can cause
more rapid engine corrosion.
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