Westerbeke BCG4.0KW Operator's Manual page 28

Fuel System
The generator must have its own fuel supply line; in other words, it must have fis own pickup tubes and
primary filter/water separator. DO NOT tee off another engine's fuel supply. Installations where the fuel
tank(s) are at or above the generator, with the fuel supply lines to the engine's carburetor routed below the
level of the fuel tank's top, must 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 fuel line 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 shut down. A manually-operated valve
can also be installed and should be operational from 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
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NO ANTI-SIPHON DEVICE OR ELECTRICALLY
OPERATED VALVE HEEDED
NOT ACCEPTABLE
FUEL
FUEL TANK TOP LEVEL
25
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Westerbeke Generators