106
FUEL SYSTEM
FUEL PUMP PRESSURE TEST
FUEL PUMP PRESSURE
TEST
Perform this test with the outboard in a test tank or
on the boat.
Before testing, loosen fuel tank gas cap momen-
tarily to release any pressure that may have built
up. Fuel tank must not be more than 30 in. (76
cm) below fuel pump.
Remove carburetor to fuel pump hose. Connect a
fuel pressure gauge between the carburetor and
fuel pump.
Start outboard and monitor gauge. Pump pressure
must be as specified below:
Results:
If pump does not develop minimum pressure,
replace the pump.
FUEL PUMP SERVICE
Before replacing a suspect fuel pump, remove
and clean the fuel filter and install a new filter ele-
ment. Also, remove the fuel hose from the fuel
tank and blow through all passages and hoses
with low-pressure compressed air to be sure they
are open. This might be the cause of inadequate
fuel delivery. If this procedure does not correct the
trouble, perform FUEL PUMP PRESSURE TEST
on p. 106.
IMPORTANT: To prevent excessive fuel spill-
age, disconnect hose connector at outboard
before disassembly.
Disassembly
Loosen cover screw and remove cover. Do not
lose small O-ring from around center post or large
O-ring from outer edge of cover.
Cleaning
Wash filter element with clean solvent and a
brush. Do not dry parts with a cloth as lint might
stick to the parts and clog the passages. Dissolve
any gummy deposits with Cleaning Solvent.
63328
RPM Pressure
600 1 psi 7 kPa
2500-3000 1.5 psi 10 kPa
4500 2.5 psi 17 kPa
26417
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