Specifications; Fuel Recommendations - Mercury V-6 series User Manual

CA261

Specifications

Fuel Recommendations

IMPORTANT: Use of improper gasoline can damage your
engine seriously. Engine damage resulting from use of
improper gasoline is considered misuse of engine, and damage
caused thereby will not be covered under the limited warranty.
FUEL RATINGS
MerCruiser engines will operate satisfactorily when using a major
brand of unleaded gasoline as follows:
USA and Canada - having a posted pump Octane Rating of
87 (R+M)/2 minimum. Premium gasoline [92 (R+M)/2 Octane]
is also acceptable. DO NOT use leaded gasoline.
Outside USA and Canada - having a posted pump Octane Rating
of 90 RON minimum. Premium gasoline (98 RON) is also
acceptable. If unleaded gasoline is not available, use a major brand
of leaded gasoline.
CA291
USING REFORMULATED (OXYGENATED) GASOLINES
(USA ONLY)
This type of gasoline is required in certain areas of the USA. The two
types of "oxygenates" used in these fuels is Alcohol (Ethanol) or
Ether (MTBE or ETBE). If Ethanol is the "oxygenate" that is used in
the gasoline in your area, refer to "Gasolines Containing Alcohol"
also.
These "Reformulated Gasolines" are acceptable for use in your
MerCruiser engine.
CA618
GASOLINES CONTAINING ALCOHOL
If the gasoline in your area contains either "methanol" (methyl
alcohol) or "ethanol" (ethyl alcohol), you should be aware of certain
adverse effects that can occur. These adverse effects are more
severe with "methanol." Increasing the percentage of alcohol in the
fuel can also worsen these adverse effects.
Some of these adverse effects are caused because the alcohol in the
gasoline can absorb moisture from the air, resulting in a separation
of the water/alcohol from the gasoline in the fuel tank.
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