Mercury 3.0 Liter Service Manual download pdf (Page 95)

90-898303

4-10

Priming The Oil Pump

NOTE: If a new powerhead is being installed or oil hoses/oil pump has been

removed, it is recommended all air be purged from oil pump/oil lines using

gearcase leakage tester (FT-8950)(a). Connect the leakage tester to the inlet

t-fitting on the onboard oil reservoir. While clamping off the inlet hose,

manually pressurize the reservoir to 10 psi. Using the Digital Diagnostic

Terminal 91-823686A2, activate the oil pump prime sequence. Maintain the 10

psi pressure throughout the auto prime sequence. When the auto prime is

completed, remove the leakage tester and refill the onboard oil reservoir.

Priming the oil pump (filling pump and hoses using pressure) is required on

new or rebuilt power heads and any time maintenance is performed on the

oiling system that allows air into the oil system.

There are three methods for priming the oil pump:

METHOD 1 – SHIFT SWITCH ACTIVATION PRIME

This method does three things:

a) Fills the oil pump, oil supply hose feeding pump and oil hoses going to the

crankcase and air compressor.

b) Activates break-in oil ratio.

c) .Initiates a new 120 minute engine break-in cycle.

Refer to priming procedure following.

METHOD 2 – (DDT) DIGITAL DIAGNOSTIC TERMINAL – RESET

BREAK-IN

This method is the same as Method 1, except the run history and fault history

are erased from the ECM.

Refer to procedure in the Technician Reference Manual provided with the

Digital Diagnostic Software Cartridge Part 91-880118A2.

Notes

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Mercury 3.0 Liter Service Manual Page 95