Engine Idle Speed Adjustment; Fuel Line Inspection; Carburetor Adjustments - Mercury Sea Pro User Manual

2. Dispose of fuel properly.

FUEL LINE INSPECTION

Visually inspect the fuel line and primer bulb for cracks, swelling, leaks, hardness, or other signs of deterioration
or damage. If any of these conditions are found, the fuel line or primer bulb must be replaced.

CARBURETOR ADJUSTMENTS

Slow Speed Mixture Adjustment
1. Before starting engine, turn the slow speed mixture screw in until it is lightly seated then back it out 1-1/4 turns.
2. With boat tied securely to dock, start engine and allow it to warm up.
3. Shift the outboard into forward gear while maintaining idle speed.
4. Turn the slow speed mixture screw slowly in until the engine starts to misfire or stall due to a lean mixture.
Note the position of the screw slot.
5. Turn the slow speed mixture screw slowly out until the engine starts to load up or fire unevenly due to a rich
mixture. Note the position of the screw slot.
6. Set the slow speed mixture screw midway between the rich and lean setting. When in doubt, set the mixture
slightly rich rather than too lean.

Engine Idle Speed Adjustment

1. With boat tied securely to dock, start engine and allow it to warm up.
2. Shift the outboard into forward gear while maintaining idle speed.
MAINTENANCE
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