Operator`s manual
Fuel System
The generator
lilll3.1
have its own fuel supply line; in other words, it
lilll3.1
have its own fuel tank pickup tube
and primary filter/water separator. Do
no\
tee off another engine's luel supply. Installations where the
fuel
tank(s) are at
or
above the generator, with the fuel supply lines
10
the engine's carburetor routed below the
level
of
the fuel tank's top,
lilll3.1
have a means of shutting off the fuel
to
the generator's engine when the
en-
gine
is
not running. This installation procedure helps guard against the possibility of gasoline siphoning
through the
supply line into the engine through the carburetor, should the carburetor float needle valve stick
in the open position or not seat properly, or should the
luelline
rupture between the engine and fuel tank.
This (anti-siphon) shut-off
valve can be electrically-operated (with a manual override) to open when the gen-
erator's engine is started, and to close when the generator's engine
is
shu! down. A manually-operated valve
can also be installed and should be operationallrom the generator's start/stop panel or from the vessel's
deck.
Installations where the generator
is
located above the fuel tank(s), whereby the routing of the fuel
supply line to the generator's carburetor remains above the top level of the fuel tank,
do
not require this (anti-
siphon) shut-off valve. A manually-operated service shut-off valve should be located between the fuel pick-
up at the tank and the service shut-off valve located at the fuel connection
to
the generator.
The
two
illustrations that follow were taken from the Coast Guard publication Fuel System Compliance
Guideline.
These illustrations show basic fuel system layouts that incorporate anti-siphon protection.
All fuel lines should be routed and supported to prevent leaks from vibration and chaffing. The line should
be supported every
12
-
14
inches. Use
as
few connections as possible
in
the plumbing of these lines.
The fuel tank's vent should be located so that its discharge route
cannot
allow water to enter through to the
fuel tank(s). Moisture must
not
be allowed to accumulate in the vent's line.
FUEL
liNE
ALWAYS
ABOVE
FUEL
TANK
TOP
LEVEL
FUEL
TANK
TOP
lEVEL
'...-
-
__
---~~~~::::-::~=:--::-d
FUEl
TANK
NO
ANTI-SIPHON
DEVICE
OR
ELECTRICAllY
OPERATED
VALVE
NEEDED
NOT
ACCEPTABLE
'"
FUEl
FUEL
TANK
TOP
lEVEL
19 Westerbeke Generators