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Fuel
Systems
Equipment Standards
FEDERAL LAW
183.524 - Fuel pumps
(a) Each diaphragm pump must not leak
fuel from the pump if the primary diaphragm fails.
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A diaphragm pump is the usual type of fuel
pump found on marine engines. This requirement calls for means
to prevent fuel from leaking into the interior of the boat
or into the bilge if the main diaphragm fails. Some means
presently used to accomplish this are:
- A second diaphragm with a means of identifying
failure of the primary diaphragm, such as a sight glass
bowl, and
- A sealed fuel pump hosing connected to the
crankcase or equipped with a stripper tube connected to
the carburetor.
Automotive fuel pumps are vented. In a vehicle,
fuel leaking from a ruptured diaphram falls harmlessly on
the ground; in a boat, this type of pump would allow leaking
fuel to accumulate in the bilge.
FIGURE
11 - Fuel Pumps, Diaphragm Type
TO COMPLY WITH THE LAW
- Is there a provision to prevent fuel
leakage if the primary diaphragm of a fuel pump fails?
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