143
FUEL SYSTEM
FUEL SYSTEM TESTS
7
Fuel Injector Resistance Test
Disconnect the battery cables at the battery.
Use a digital multimeter to measure the injector
coil resistance.
Use a digital multimeter with appropriate adapter
leads to measure resistance of the complete injec-
tor circuit, including injector and associated wiring.
Measure resistance between pin 1 (white/red) of
injector connector (connected) and the appropri-
ate pin location of EMM J1-B connector (discon-
nected). Refer to engine wiring diagram for
specific EMM J1-B connector pin location for the
injector circuit being tested (blue, purple or green).
Resistance should be the same as, or slightly
higher than, the injector alone.
Circulation Pump Resistance Test
Disconnect the battery cables at the battery.
Use a digital multimeter with appropriate adapter
leads to measure the fuel pump circuit and coil
resistance.
Lift Pump Pressure Test
Install a 0 to 15 psi (0 to 103 kPa) Fuel Pressure
Gauge, P/N 5006397 or equivalent, to the lower
fuel pressure test fitting.
Prime the fuel system and check for leaks. START
outboard and run at idle speed. Hold gauge level
with inlet fitting and monitor gauge for pressure
reading.
Pressure should stabilize at a reading greater
than 3 psi (27 kPa).
Fuel Injector Coil Resistance
2 to 3 Ω
@ 72°F (22°C)
006620
006621
Fuel Pump Resistance
3 Ω @ 77°F (25°C)
006633
1. Fuel pressure gauge
2. Test fitting
006634
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