Engine Over‑Speed (Excessive RPM)
POSSIBLE CAUSES
•
Outboard mounted too high on the transom.
•
Worn jet pump impeller or liner.
•
Incorrect jet pump impeller clearance adjustment.
•
Tilting the outboard out beyond a vertical position.
•
Cavitation of the impeller due to rough water or obstruction in
the boat hull.
•
Blockage of the water intake.
Performance Loss
POSSIBLE CAUSES
•
Throttle not fully open.
•
Damaged impeller.
•
Incorrect engine timing, adjustments, or setup.
•
Boat overloaded or load improperly distributed.
•
Excessive water in bilge.
•
Boat bottom is dirty or damaged.
TROUBLESHOOTING
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