Starting The Engine - Mercury 225 Pro XS User Manual

Starting The Engine

Never start or operate your outboard (even momentarily) without water
circulating through all the cooling water intake holes in the gearcase to
prevent damage to the water pump (running dry) or overheating of the
engine.
INITIAL STARTING PROCEDURE
NOTE: For initial start up of a new engine, or for an engine that ran out of
fuel or was drained of fuel, the fuel system should be filled according to the
following procedure.
1. Squeeze the fuel line primer bulb until it feels firm.
2. Turn the ignition key switch to the "ON" position for three seconds.
This operates the electric fuel pump.
3. Turn the ignition key switch back to the "OFF" position, and squeeze
the primer bulb again until it feels firm. Turn the ignition key switch to
the "ON" position again for three seconds. Continue this procedure
until the fuel line primer bulb stays firm.
Before starting, read the Pre‑Starting Check List, Special Operating
Instructions, in the Operation Section.
STARTING PROCEDURE
1. Lower the outboard to the "RUN" position. Make sure all the cooling
water intake holes are submerged.
2. Open fuel tank filler cap vent screw (manual venting fuel tanks).
OPERATION
CAUTION
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