54
Fuel System
5.2 Outboard Engine Fuel System
The gasoline fuel system has one fuel tank that
lls from the port gunnel. The starboard engine
is supplied by the starboard fuel line and the port
engine is supplied by the port fuel line. If your
boat is equipped with triple engines, the center
engine will be supplied by a center fuel line. There
is an on/off valve for each supply line located on
the fuel tank near each withdrawal tube. The
valves provide a means to turn off the fuel supply
to service the fuel system.
Fuel withdrawal lines are equipped with anti-
siphon valves where the lines attach to the fuel
tanks. These valves prevent gasoline from siphon-
ing out of the fuel tank should a line rupture.
DO NOT REMOVE THE ANTI-SIPHON VALVES FROM THE SYSTEM.
SHOULD AN ANTI-SIPHON VALVE BECOME CLOGGED, CLEAN
AND REINSTALL OR REPLACE. IF A FUEL LINE SHOULD LEAK,
ANTI-SIPHON VALVES PREVENT A SUBSTANTIAL AMOUNT OF
FUEL FROM FLOWING INTO THE BILGE. ANTI-SIPHON VALVES
ARE REQUIRED TO BE INSTALLED IN ALL BOATS EQUIPPED
WITH GASOLINE ENGINES BY THE U.S. COAST GUARD
Engine Fuel Filters
On most engine installations, the fuel lter for
each engine is installed in the stern systems
compartment. The lters are accessed through
the hatch at the rear of the cockpit sole. The fuel
Typical Yamaha Engine Fuel Filters
Primer Bulbs Near Fuel Filters
lters for Verado engines are mounted on each
engine. The lters are the water separator type
and should be serviced frequently to assure an
adequate supply of clean, dry fuel to the engines.
It is recommended that the lters be inspected
periodically and the elements changed as needed.
There is a primer bulb in each fuel line located
near the fuel lters that is used to prime the fuel
system after service or as required. See Fuel Sys-
tem Maintenance and the engine owner’s manual
for additional information regarding fuel lters and
the outboard engine fuel system.
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