9-2
Trouble Check Chart
Performance
Symptom Possible Cause
Starter motor will not operate • Shift handle not in NEUTRAL
• Battery disconnect switch OFF
• Battery and electrical connection
loose or corroded
Engine will not start • Emergency stop switch not in
place
• Starting procedure not followed
• Fuel tank empty
Poor boat performance • Contaminated fuel
• Clogged fuel filter
• Uneven load distribution
• Improper propeller selection
• Marine growth on hull
• Engine problem
Poor gas mileage • Marine growth on hull
• Engine problem
Excessive vibration • Damaged or fouled propeller
• Misaligned propeller shaft
coupling
• Bent propeller shaft
• Engine problem
• Fouled or damaged propeller
• Engine problem
Steering problem • Corroded steering cable
• Rudder worn
Throttle/shifting problems • Corroded cables
• Defective throttle return spring
• Low transmission fluid level
• Sticking transmission shift lever
Section 9
Engine runs but boat
makes little or no
progress
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