Starting The Engine - Mercury 225 Manual

Models with a single‑ram trim system: The outboard will remain
at the selected tilt position, regardless of engine RPM.

Starting the Engine

Without sufficient cooling water, the engine, the water pump,
and other components will overheat and suffer damage.
Provide a sufficient supply of water to the water inlets during
operation.
INITIAL STARTING PROCEDURE
NOTE: For the 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. 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.
2. Turn the ignition key switch to the "ON" position for three
seconds to operate the electric fuel pump.
3. Turn the ignition key switch back to the "OFF" position, and
squeeze the primer bulb 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 and 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.
eng
OPERATION
NOTICE
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