141
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 dig ital multimeter with ap propriate adapter
leads to measure resistance of the complete injec-
tor circuit, including injector and associated wiring.
Measure resist ance betwee n pin 1 (wh ite/red) of
injector con nector (connected) and the approp ri-
ate pin lo cation o f EMM J1-B co nnector (discon-
nected). Refer to engin e wiring diag ram for
specific EMM J1-B connector pin location for the
injector circuit being tested (blue, purple or green).
Resistance should be the same as, o r slightly
higher than, the injector alone.
Circulation Pump Resistance Test
Disconnect the battery cables at the battery.
Use a digital multimeter with app ropriate adapter
leads to measure the fue l pump circuit an d coil
resistance.
Lift Pump Pressure Test
Install a 0 to 15 p si (0 to 103 kPa) Fue l Pressure
Gauge, P/N 5006397 or equ ivalent, to the lower
fuel pressure test fitting.
Prime the fuel system and check for leaks. START
outboard and run at idle speed. Hold gaug e level
with inlet fitting and monitor g auge for pre ssure
reading.
Pressure shou ld st abilize a nd gau ge must n ot
indicate less than 4 psi (27 kPa).
Fuel Injector Coil Resistance
2 to 3 Ω
@ 72°F (22°C)
006865
004342
Fuel Pump Resistance
3 Ω @ 77°F (25°C)
004217
1. Fuel pressure gauge
2. Test fitting
004587
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