26. This section covers testing the fuel system for leaks. Engine starvation
can result from a leak or malfunction of any of the main components of the fuel
system. The five main components are the fuel tank, fuel tank breather, fuel
filter, delivery tubes, and carburetor.
26. FUEL SYSTEM LEAKS
26.1
Remove and inspect the fuel filter.
A Replace the fuel filter if there is
any foreign material in the felt or the
internal screen.
26.2
Test the main fuel pick-up tube for
leaks.
A. Install the pressure gauge and bulb.
B. Pressurize the tube to 7psi (0.5 bar).
C. If the pressure does not maintain,
separate the fuel line from the
carburetor.
D. Plug one end of the main fuel pick-
up tube.
E. Re-pressureize the tube to 7psi (0.5
bar).
F. Replace the tube if pressure is not
maintained.
G. If the main fuel pick-up tube does
maintain pressure, then the leak has
been isolated to the carburetor. Refer
to the Walbro Diaphragm Carburetor
Service Manual.
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