1C-16 - TROUBLESHOOTING 90-823225--1 1096
Engine Runs Poorly At High RPM
Cause Special Information
Also refer to “Poor Boat Performance”
Crankcase overfilled with oil Check oil level with boat at rest in the water.
Anti-siphon valve (if equipped) Restricting fuel supply
Plugged fuel tank vent
Fuel supply Refer to “Carburetor Malfunctions”
(See “Table of Contents”)
Ignition timing
Low grade of fuel or water in the fuel
Spark plugs Fouled, burned, cracked porcelain, incorrect
heat range
Spark plug wires Poor insulation, broken wires
Distributor cap or rotor Dirty or cracked
Coil
Distributor Excessive play in shaft
Engine overheating Refer to “Engine Overheats”
Low compression Worn valves, rings, cylinders, etc.
Restricted exhaust
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