Fault-tracing
A number of symptoms and possible causes for engine disturbances are described in the table below. If faults or
hitches arise that you cannot solve alone, you must always get in touch with your Volvo Penta dealer.
WARNING! Read the safety directions for maintenance and service in the chapter “Safety information” be-
fore starting work.
1. Discharged battery
2. Loose connection/open-circuit
3. Fuse tripped
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/pro-
peller
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/incorrect propeller
16. Defective engine mounting
17. Too little coolant
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. Alternator drive belt slipping
Symptom and possible cause
Starter motor not turning (or slow) 1, 2, 3
Engine does not start 4, 5, 6, 7
Engine starts but stops again 6, 7
Engine difficult to start 4, 5, 6, 7
Engine does not reach correct speed at wide open throttle (WOT) 5, 6, 7, 8, 9, 10, 11, 15, 18, 19, 20, 21
Engine knocks 4, 5, 6, 7
Engine runs unevenly 4, 5, 6, 7, 10, 11
Engine vibrates 15, 16
High fuel consumption 8, 9, 10, 12, 15
Black exhaust smoke 10
Blue or white exhaust smoke 12, 22
Low oil pressure 13, 14
Engine coolant temperature too high 17, 18, 19, 20, 21
None or poor charging 2, 23
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