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.
Read through the safety advice for care and maintenance work in chapter Safety precautions for maintenance and
service operations before starting work.
Symptoms and possible causes
Pop-ups are shown in the tachometer display See chapter Fault Code Register
Starter motor not turning (or slow) 1, 2, 3, 24
Engine does not start 3, 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, 17, 18, 20
Engine vibrates 15, 16
High fuel consumption 8, 9, 10, 12, 15, 21
Black exhaust smoke 10
Blue or white exhaust smoke 12, 21, 22
Low oil pressure 13, 14
Engine coolant temperature too high 17, 18, 19, 20, 21
No charge or poor charge 2, 23
1. Flat batteries 13. Lubricating oil level too low
2. Poor contact/open circuit in cables 14. Blocked oil filter
3. Fuse tripped or faulty relay 15. Defective/incorrect propeller
4. Lack of fuel 16. Defective engine mounting
5. Fouled fuel filter 17. Too little coolant
6. Water/contaminants in the fuel 18. Blocked seawater intake/pipe/filter
7. Leakage in the fuel system 19. Circulation pump drive belt slipping
8. Boat abnormally loaded 20. Defective impeller
9. Fouling on underwater hull/propulsion unit/
propeller
21. Defective/incorrect thermostat
22. Lubricating oil level too high
10. Insufficient air supply 23. Alternator drive belt slipping
11. Engine coolant temperature too high 24. Stored diagnostic fault codes
The codes can only be read and erased by a
service technician.
12. Engine coolant temperature too low
Fault handling
47712786 11-2022 © AB VOLVO PENTA 105
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