4
Gasoline — Oil
Recommended Gasoline
The recommended gasoline to use in this
snowmobile is minimum 91 octane
(R+M)/2 Non-Oxygenated (Non-Etha-
nol) gasoline for optimum performance.
91 octane gasoline with a maximum 10%
ethanol is acceptable but reduced engine
performance may be experienced.
Gasolines containing more than 10% eth-
anol are not acceptable gasoline for use
in this snowmobile. Do not use gasolines
containing methanol.
Recommended Injection Oil
The recommended oil to use in the oil-
injection system is YAMALUBE 2T
SYNTHETIC TWO CYCLE OIL. This
oil is specially formulated to be used and
meets all of the lubrication requirements
of the Yamaha snowmobile engine.
Filling Gas Tank
Since gasoline expands as its temperature
increases, the gas tank must be filled to
its rated capacity only. Expansion room
must be maintained in the tank particu-
larly if the tank is filled with cold gaso-
line and then moved to a warm area.
Also, if the snowmobile is to remain on a
trailer after filling the gas tank, the bed of
the trailer must be maintained level to
prevent gasoline from draining out
through the gas tank vent hose.
Engine Break-In
The engine (when new) requires a short
break-in period before the engine is sub-
jected to heavy load conditions.
Premixing fuel and oil during the break
in period is not required. Due to the oil
delivery control strategy of the electronic
oil pump, the oil pump will automatically
compensate and deliver a richer fuel-oil
ratio during the engine break-in period.
800
The break-in period occurs in two stages.
Stage One occurs during the first 18 min-
utes of a new engine's run time where the
ECM will provide additional fuel and oil
to the engine. Stage Two occurs after the
completion of Stage One. However,
Stage Two still provides additional fuel
and oil to the engine for the remainder of
6 hours. This additional fuel and oil is
less than the amount added during Stage
One.
400
The break-in period occurs in two stages.
Stage One occurs during the first 18 min-
utes of a new engine’s run time where the
ECM provides additional oil to the
engine, along with limiting engine RPM
to 6500 RPM. Stage Two occurs after the
completion of Stage One and eliminates
the engine RPM limiter. However, Stage
Two still provides additional oil to the
engine for the remainder of 6 hours. This
additional oil is less than the amount
added during Stage One.
CAUTION
Do not use white gas or gasoline con-
taining methanol. Only Yamaha-
approved gasoline additives should
be used.
CAUTION
If a situation arises wherein 91 octane
gasoline is not available, 87 octane
gasoline can be substituted in an
emergency; however, the prolonged
usage of 87 octane gasoline can
cause severe engine damage.
CAUTION
Any oil used in place of the recom-
mended oil could cause serious
engine damage.
! WARNING
Always fill the gas tank in a well-venti-
lated area. Never add gasoline to the
snowmobile gas tank near any open
flames or with the engine running. DO
NOT SMOKE while filling the gas tank.
Do not sit on the snowmobile without
first installing the gas tank cap.
Summary of Contents for SXV4NP
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