Fault-tracing
A number of symptoms and possible causes of engine malfunctions are described in the table below. Always
contact your Volvo Penta dealer if problems occur which you can not solve by yourself.
WARNING! Read through the safety advice for care and maintenance work in the “Safety information”
chapter before 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/
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/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. Generator drive belt slipping
24. Stored diagnostic fault codes
(NOTE! The codes can only be read
and erased by a service techni-
cian.)
Symptom and possible cause
Pop-ups are shown in the tachometer display See the “Fault register” chapter
Starter motor not turning (or slow) 1, 2, 3, 24
Engine does not start 4, 5, 6, 7, 24
Engine starts but stops again 6, 7, 24
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, 24
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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