Mercury 225 User Manual page 35

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.
1. Make sure the cooling water intake is submerged.
2. Check the engine oil level.
3. Open fuel tank vent on manual venting type tanks.
4. Squeeze the fuel line primer bulb several times until it feels firm.
NOTE: The engine will not start unless the lanyard is set to the "RUN" position.
5. Set the lanyard stop switch to the "RUN" position. Refer to General Information - Lanyard Stop Switch.
OPERATION
CAUTION
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