Mercury 250 Specifications download pdf (Page 92)

OUTBOARD INSTALLATION

Some accessories not manufactured or sold by Mercury Marine

are not designed to be safely used with this outboard or outboard

operating system. Acquire and read the installation, operation, and

maintenance manuals for all selected accessories.

Fuel Tanks

PORTABLE FUEL TANK

Select a suitable location in the boat within the engine fuel line

length limitations and secure the tank in place.

PERMANENT FUEL TANK

Permanent fuel tanks should be installed in accordance with

industry and federal safety standards, which include

recommendations applicable to grounding, anti‑siphon protection,

ventilation, etc.

Low Permeation Fuel Hose Requirement

Required for outboards manufactured for sale, sold, or offered for

sale in the United States.

• The Environmental Protection Agency (EPA) requires that any

outboard manufactured after January 1, 2009 must use low

permeation fuel hose for the primary fuel hose connecting the

fuel tank to the outboard.

• Low permeation hose is USCG Type B1‑15 or Type A1‑15,

defined as not exceeding 15/gm²/24 h with CE 10 fuel at

23 °C as specified in SAE J 1527 ‑ marine fuel hose.

Filling the Fuel System

NOTE: For initial start of a new engine, or for an engine that ran

out of fuel or was drained of fuel, the fuel system should be filled

as follows:

Turn the ignition key switch to the "ON" position for approximately

one minute. This operates the fuel lift pump. Turn the ignition key

switch back to the "OFF" position and then return the ignition key

switch to the "ON" position again for an additional minute. Turn the

ignition key switch back to the "OFF" position. The filling of the fuel

system is complete.

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Mercury 250 Specifications Page 92