Mercury 250 XS OptiMax Operation, Maintenance & Installation Manual page 125

OUTBOARD INSTALLATION
PRIMING THE OIL INJECTION PUMP
Before starting the engine for the first time, prime the oil injection pump.
Priming will remove any air that may be in the pump, oil supply hose, or internal
passages.
a
a - Oil supply hose
b - Oil injection pump
IMPORTANT: Fill the engine fuel system with fuel before priming the oil
injection pump. Otherwise, the fuel pump will run without fuel during the priming
process and may be damaged.
1. Fill the fuel system.
a. Connect fuel hose.
b. Fill the fuel system by squeezing the primer bulb.
c. Position the fuel line primer bulb so the arrow on the side of the bulb is
pointing up. Squeeze the fuel line primer bulb until it feels firm.
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b
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