Priming The Oil Pump - Mercury Optimax 115 Service Manual

OIL INJECTION

Priming the Oil Pump

Priming the oil pump (filling pump and hoses) is required on new or rebuild engines and
any time maintenance is performed on the oiling 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 crank-
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 Diagnos-
tic Software Cartridge Part. No. 91-822608-4 or -5.
METHOD 3 – (DDT) DIGITAL DIAGNOSTIC TERMINAL – OIL PUMP PRIME
This method fills the oil pump, oil supply hose feeding pump, and oil hoses going to the
crankcase and air compressor.
Refer to procedure in the Technician Reference Manual provided with the Digital Diagnos-
tic Software Cartridge Part. No. 91-822608-4 or -5.
New engine
Rebuilt Powerhead
New Powerhead
Oil system ran out of oil
Oil drained from oil supply hose feeding pump
Oil pump removed
Oil injection hoses drained
Page 3C-12
case and air compressor.
Conditions Requiring Priming the Oil Pump
Condition Priming Procedure
Use Method 1 or 2
Use Method 1 or 2
Use Method 1 or 2
Use Method 3
Use Method 3
Use Method 3
Use Method 3
90-855347R1 JANUARY 1999