Filling Fuel Tank; Fuel Requirements - Mercury GO BOLDLY 25 EFI Operation, Maintenance And Installation Manual

Filling Fuel Tank

Avoid serious injury or death from a gasoline fire or explosion. Use caution
when filling fuel tanks. Always stop the engine and do not smoke or allow
open flames or sparks in the area while filling fuel tanks.
Fill the fuel tanks outdoors away from heat, sparks, and open flames.
Remove the portable fuel tanks from the boat to fill them.
Always stop the engine before filling the tanks.
Do not completely fill the fuel tanks. Leave approximately 10% of the tank
volume unfilled. Fuel will expand in volume as its temperature rises and can
leak under pressure if the tank is completely filled.
PORTABLE FUEL TANK PLACEMENT IN THE BOAT
Place the fuel tank in the boat so the vent is higher than the fuel level under
normal boat operating conditions.

Fuel Requirements

IMPORTANT: Use of improper gasoline can damage your engine. Engine
damage resulting from the use of improper gasoline is considered misuse
of the engine and will not be covered under the limited warranty.
FUEL RATINGS
Mercury outboard engines will operate satisfactorily with any major brand of
unleaded gasoline that meets the following specifications:
USA and Canada ‑ A posted pump octane rating of 87 (R+M)/2, minimum, for
most models. Premium gasoline 91 (R+M)/2 octane is also acceptable for most
models. Do not use leaded gasoline.
Outside USA and Canada ‑ A posted pump octane rating of 91 RON,
minimum, for most models. Premium gasoline (95 RON) is also acceptable for
all models. Do not use leaded gasoline.
USING REFORMULATED (OXYGENATED) GASOLINE (USA ONLY)
Reformulated gasoline is required in certain areas of the USA and is
acceptable for use in your Mercury Marine engine. The only oxygenate
currently in use in the USA is alcohol (ethanol, methanol, or butanol).
GASOLINE CONTAINING ALCOHOL
Bu16 Butanol Fuel Blends
Fuel blends of up to 16.1% butanol (Bu16) that meet the published Mercury
Marine fuel rating requirements are an acceptable substitute for unleaded
gasoline. Contact your boat manufacturer for specific recommendations on
your boat's fuel system components (fuel tanks, fuel lines, and fittings).
eng
FUEL AND OIL
WARNING
!
51