Mercury Optimax User Manual page 59

1. Lower the outboard to the vertical operating position. Make
sure all cooling water intake holes are submerged.
2. Open the fuel tank vent screw, located in the filler cap, on
manual venting type fuel tanks.
3. Position the fuel line primer bulb so the arrow on the side of
the bulb is pointing up. Squeeze the fuel line primer bulb
several times until it feels firm.
4. Set the lanyard stop switch to "RUN" position. Refer to
General Information ‑ Lanyard Stop Switch.
OPERATION
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