Engine Oil Requirements; Fuel Requirements; Gasoline; Muddy Or Acidic Water - Yamaha E25B Owner's Manual

Specifications and requirements
EMU25651

Engine oil requirements

Recommended engine oil:
YAMALUBE 2-stroke outboard motor
oil
If the recommended engine oil is not avail-
able, another 2-stroke engine oil with an
NMMA-certified TC-W3 rating may be used.
EMU36360

Fuel requirements

EMU36770

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. Yamaha re-
comends that you use alcohol-free (see
Gasohol) gasoline whenever possible.
Recommended gasoline:
Regular unleaded gasoline
ECM01980
NOTICE
Do not use leaded gasoline. Leaded
●
gasoline can seriously damage the en-
gine.
Avoid getting water and contaminants
●
in the fuel tank. Contaminated fuel can
cause poor performance or engine
damage. 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% etha-
nol can cause fuel system damage or cause
13
engine starting and running problems.
Yamaha does not recommend gasohol con-
taining methanol because it can cause fuel
system damage or engine performance
problems.
EMU36880

Muddy or acidic water

Yamaha strongly recommends that you have
your dealer install the optional chromium-
plated water pump kit if you use the outboard
motor in muddy or acidic water conditions.
However, depending on the model it might
not be required.
EMU36330

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
marine growth.
Do not use anti-fouling paint which includes
copper or graphite. These paints can cause
more rapid engine corrosion.
EMU36340

Motor disposal requirements

Never illegally discard (dump) the motor
Yamaha recommends consulting the dealer
about discarding the motor.