Gasoline Additives; Muddy Or Acidic Water; Anti-Fouling Paint - Yamaha LF250 Owner's Manual

ternal 10-micron water-separating fuel filter
be installed on your boat and serviced fre-
quently. Consult your authorized Yamaha
dealer for a 10-micron filter that meets your
engine's requirements.
EMU41342

Gasoline Additives

Gasoline blends change to meet automobile
emission regulations and economic condi-
tions. Additives, added by gasoline distribu-
tors, necessary for proper automobile engine
operation and durability, may not be suffi-
cient for typical boat applications. Intake
valve and combustion chamber deposits
may accumulate in boat engines more rapidly
than encountered in automotive use. In addi-
tion, gasoline used for boating will typically
age longer between refills than gasoline used
in automobiles, resulting in stale and unus-
able gasoline that may cause starting and
running problems, fuel system damage, and
internal engine damage.
Yamaha recommends the use of two Yama-
lube gasoline additives to reduce internal de-
posits and extend the storage life of gasoline.
Continuous use of Yamalube Ring Free Fuel
Additive Plus reduces harmful internal de-
posits. Yamalube Fuel Stabilizer & Condition-
er Plus added to fresh gasoline will help
protect the fuel system from varnishing while
helping to keep the gasoline's octane level
from decreasing excessively during storage.
Other additives may also be available on the
market that may have varying degrees of ef-
fectiveness. Consult your Yamaha dealer
concerning what may work best for the local-
ly available gasoline and environmental con-
ditions.
Specifications and requirements
EMU36881
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.
EMU41354
A clean hull is required to maintain your
boat's performance. Boats moored in the wa-
ter should be protected from marine growth
(barnacles, mussels, and marine plants). If
approved by regulations for your area, the
bottom of the hull can be coated with an anti-
fouling paint to inhibit marine growth.
Anti-fouling paints specifically formulated for
use on aluminum may be applied to the out-
board motor. The original Yamaha paint sur-
face may be scuffed lightly before applying
anti-fouling paint, but do not remove the orig-
inal paint. Removal of the original paint will in-
crease the rate of corrosion.
ECM04821
NOTICE
 Anti-fouling paint for fiberglass and
wood may contain materials, such as
copper, graphite, and tin, that can cause
corrosion if applied to aluminum boats
and outboard motor components. Never
apply these types of paint to your out-
board motor because rapid corrosion
damage could occur.
 Anti-fouling paint can increase drag
(friction) between the boat and the wa-
ter, and possibly affect performance. If
the effects are too great, reducing pro-
peller pitch may be necessary.

Muddy or acidic water

Anti-fouling paint

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