and discover their location by reading the associated owner’s manual
so that you can fi x a fuel system problem when the need arises out on
the water. The pictures displayed in this section may not refl ect you
specifi c engine. Always review your engine owner’s manual fi rst.
Fuel Fill Cap
The fuel fi ll is labeled with either “gas” or “diesel” and are normally
located along the starboard side fo the boat on the aft portion of the
deck. When fueling, it is important to keep the fi ll nozzle in contact
with the fuel fi ll line since it decreases static electricity, which may
spark and ignite gasoline vapors. Always use the recommended fuel
octane rating as specifi ed in your engine owner’s manual. Extinguish
all fl ame producing agents before fueling. The fi ll cap leads to the
anti-siphon valve and fuel tank.
Anti Siphon Valve
The anti-siphon valve at the base of the fuel feed line is pulled off its
seat by fuel pump pressure as the engine is cranking or running. It
forms a one-way fuel roadway by sealing off the fuel feed line from
the fuel fi tting. It prevents fuel from siphoning out of the tank in the
event of a fuel line rupture, or disconnected fuel feed hose. It is an
important safety item, so DO NOT remove the anti-siphon valve.
Fuel Vent
Fuel vents are often combined into the fuel fi tting on the deck. Fuel
tanks are vented overboard for the fumes to escape. While the tank
is fi lled with fuel, air is displaced by the incoming fuel, and relieved
through the fuel vent hose. When the fuel tank is near full, slow down
or stop the nozzle fl ow to keep the fuel from splashing out the vent.
3-12
Chapter 3
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