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Fuel
Systems
Equipment Standards
FEDERAL LAW
183.524 - Fuel pumps
(c) If tested under Sec. 183.590
each fuel pump, as installed in the boat, must not leak
more than five ounces of fuel in 2-1/2 minutes, inclusive
of leaks from fuel line, fuel filter and strainer.
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Fuel pumps must be able to withstand the 2-1/2
minute fire test as described in 183.590
of this regulation. The fuel pump may be tested separately
in a fire chamber or as installed on the engine. If a fuel
pump can be mounted either on the engine or remotely such
as an electrically operated fuel pump, it may be tested according
to where it is located in a specific installation. For example:
- If the electric fuel pump is to be mounted
on an engine, it may be fire tested on an engine.
- If it is to be mounted remote from the engine,
but in compliance with 183.566
(within 12 inches of the engine), it may be fire tested
with the engine, providing the fire pan under the engine
includes the fuel pump.
- If it is to be mounted remote from the engine,
such as a fuel transfer pump, it must be tested in a fire
chamber as a separate component.
- A fuel pump may be qualified for installation
in any permitted location by conducting the fire test in
a fire chamber.
Following the fire test, the fuel pump will
be subjected to a 3-foot head of fuel in order to determine
if it exceeds the permitted 5ounces leakage of fuel in 2-1/2
minutes. While the fire test is usually performed by the pump
manufacturer, the boat builder must remember that leakage
from an associated fuel filter or strainer must be included.
The content of an engine-mounted fuel line from the fuel pump
to the carburetor must be added, if it will drain through
the pump.
FIGURE
13 - Fuel Pump Leakage Test
TO COMPLY WITH THE LAW
- Will the fuel pump withstand a fire
test as specified in 183.590,
without leaking more than five ounces of fuel in 2-1/2
minutes?
NOTE: You
must also consider how much fuel will drain out of your
fuel filter and hoses. |
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