171
ENGINE
DIAGNOSTIC CHART
Problem Possible Cause
Power Loss Damaged propeller/propeller hub slipping
Improper trim angle
Spark plugs fouled
Fuel system malfunction
Hull bottom fouled with debris
Excess water in bilge (leak)
Engine code system energized due to
malfunction (rpm’s restricted).
Excessive Vibration Damaged propeller
Damaged propeller shaft
Loose/broken motor mount
Steering pivot loose or damaged
Debris caught on propeller
Ignition malfunction
Motor mount bolts loose
Failed gimbal bearing on drive input shaft
U-joint failure (more pronounced in tight turn.
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