Mercury 225 EFI, Service Manual

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OUTBOARD MOTOR INSTALLATION
90-884294 OCTOBER 2001 Page 1D-17
Conditions Requiring Priming the Oil Pump
Condition Priming Procedure
New engine Use Method 1 or 2
Rebuilt Powerhead Use Method 1 or 2
New Powerhead Use Method 1 or 2
Oil system ran out of oil Use Method 3
Oil drained from oil supply hose feeding pump Use Method 3
Oil pump removed Use Method 3
Oil injection hoses drained Use Method 3
Priming Procedure – Method 1
METHOD 1 – SHIFT SWITCH ACTIVATION PRIME PROCEDURE
Before starting engine for the first time, prime the oil pump. Priming will remove any
air that may be in the pump, oil supply hose, or internal passages.
a b
a - Oil Injection Pump b - Oil Supply Hose
CAUTION
To prevent damage to the fuel pump, fill the engine fuel system with fuel. Other-
wise the fuel pump will run without fuel during the priming process.
Prime the oil injection pump as follows:
1. Fill the engine fuel system with fuel. Connect fuel hose and squeeze primer bulb until
it feels firm.
2. Turn the ignition key switch to the “ON” position.
3. Within the first 10 seconds after the key switch has been turned on, move the remote
control handle from neutral into forward gear 3 to 5 times. This will automatically start
the priming process.
N
F
NOTE: It may take a few minutes for the pump to complete the priming process.