Mercury 250 XS OptiMax Operation, Maintenance & Installation Manual page 50

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 injection pump
b - Oil supply hose
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.
Prime the oil injection pump as follows:
1. Fill the engine fuel tank with fuel.
2. Position the fuel primer bulb so the arrow on the side of the bulb is
pointing up. Squeeze the fuel hose primer bulb until it feels firm.
OPERATION
b
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