Fault-Tracing/Diagnostics - Volvo Penta KAD32 Instruction Book

Fault-tracing
Problem
Starter motor not turning (or slow)
Engine does not start
Engine starts but stops again
Engine difficult to start
Engine does not reach correct speed at wide open throttle (WOT)
Engine knocks
Engine runs unevenly
Engine vibrates
High fuel consumption
Black exhaust smoke
Blue or white exhaust smoke
Low oil pressure
Engine coolant temperature too high
None or poor charging
List of probable causes
1. Discharged battery
2. Loose connection/open-circuit
3. Fuse (in the relay box) blown.
4. Lack of fuel
5. Fouled fuel filter.
6. Air in the fuel injection system
7. Water/contaminants in the fuel
8. Boat abnormally loaded
9. Fouling on underwater hull/drive/propeller
10. Insufficient air supply
11. Engine coolant temperature too high
12. Engine coolant temperature is too low
13. Lubricating oil level too low.
14. Blocked oil filter
15. Defective/malfunctioning propeller
16. Defective engine mounting
17. Too little coolant
Probable cause
1, 2, 3
4, 5, 6, 7
6, 7
4, 5, 6, 7
5, 6, 7, 8, 9, 10, 11, 15, 18, 19, 20, 21
4, 5, 6, 7
4, 5, 6, 7, 10, 11
15, 16
8, 9, 10, 12, 15
10
12, 22
13, 14
17, 18, 19, 20, 21
2, 23
18. Blocked seawater intake/pipe/filter
19. Circulation pump drive belt slipping
20. Defective impeller
21. Defective/incorrect thermostat
22. Lubricating oil level too high
23. Generator drive belt slipping
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