Priming The Oil Injection Pump; Purging Air From The System - Mercury 200 OptiMax Jet Drive Service Manual

IMPORTANT: If the oil reservoir contains no oil prior to installation, it is recommended that the oil vent cap not be removed
to fill the oil reservoir. Removal of the vent cap may damage the threads in the oil reservoir. Damage to the threads may result
in future oil leakage. Loosen the vent cap enough to allow access to the slot between the vent cap retaining fingers. Using a
squirt oil can filled with the recommended oil, inject oil into the oil reservoir through the slot between the vent cap retaining
finger until the reservoir contains approximately 118 ml (4 oz) of oil. Refer to Purging Air from the Engine Oil Reservoir and
Remote Oil Hose, following, for the proper procedure to completely fill the engine oil reservoir.
5. Fill the oil reservoirs and prime the oil injection system. Refer to Priming the Oil Injection Pump.

Priming the Oil Injection Pump

Purging Air from the System

If a new powerhead is being installed or oil hoses/oil pump has been removed, it is recommended all air be purged from the oil
pump/oil lines using gearcase leakage tester kit (FT‑8950). 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 70 kPa (10 psi). Using the computer diagnostic
system, activate the oil pump prime sequence. Maintain the 70 kPa (10 psi) pressure throughout the auto prime sequence. When
the auto prime is completed, remove the leakage tester and refill the onboard oil reservoir.
Leakage Tester Kit
IMPORTANT: Fill the engine fuel system with fuel before priming the oil injection pump to prevent damage to the fuel pump during
the priming process.
• Priming the oil injection system 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
90-8M0050731 MAY 2011
c
b
d
a
a - Oil reservoir
b - Squirt oil can
c - Vent cap
d - Slot
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FT8950
Oil Injection
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