CHAPTER 4
4-12
Fuel Vents
Fuel tanks are vented overboard for the fumes to escape. While the
tank is filled, air displaced by the incoming fuel is relieved through the
fuel vent.
The fuel fill is located on the
starboard aft deck.
Your vessel uses a combo type
(internal vented) fuel fill. Both the
fuel fill and vent occupy the same
cavity under a protective cover.
If fuel overflows through the
vent the design forces it back into
the fuel fill hose and tank.
A seasoned skipper will hear a
distinct sound as the tank nears
the “top out” or full mode and may see fuel overflowing back into the
fuel hose through the vent. This helps avoid any overboard spills which
harm the environment. There is a key that fits the fuel fill. Use it to
secure the fitting from leaking fuel. Store the key in a safe place so it
can be easily found for fueling. Check the vent fill screen periodically
for debris.
The fuel feed line is equipped with an anti-siphon valve.The valve is
screwed into the fuel tank fitting at the feed line. The valve is pulled
off its seat by fuel pump pressure as the engine is cranking or running.
It allows a one-way fuel roadway to the engine fuel pump . It prevents
fuel from siphoning out of the tank in the event of a fuel line rupture
or disconnected fuel feed hose. See the fuel tank maintenance chapter
for more specific information on the anti-siphon valve location. Never
remove the anti-siphon valve as it is a fuel system safety item.
COMBO FUEL FILL W/
INTERNAL VENT
Anti-Siphon Valve
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