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Troubleshooting
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.
Symptom and possible cause
The diagnostic button indicator flashes See the “Diagnostic function” chapter
Engine can not be stopped 1, 2, 3, 5
Starter motor does not rotate 1, 2, 3, 4, 5, 28
Starter motor rotates slowly 1, 2
Engine does not start 6, 7, 8, 9, 28
Engine starts but stops again 7, 8, 9, 13, 28
Engine is difficult to start 7, 8, 9, 13
Engine does not reach correct operating speed at full throttle 7, 8, 9, 10, 11, 12, 13, 18, 28
Engine knocks 14
Engine runs unevenly 7, 8, 9, 13, 14
Engine vibrates 18, 19
High fuel consumption 10, 11, 13, 15
Black exhaust smoke 13, 15, 18
Blue or white exhaust smoke 14, 15, 26
Oil pressure too low 16, 17
Coolant temperature too high 20, 21, 22, 23, 24, 25, 26
No charge, or poor charge 2, 27
1. Flat batteries
2. Poor contact/broken electrical cable
3. Main switch turned off
4. Control lever not in neutral/control
position not activated
5. A fuse/circuit breaker has tripped
6. Lack of fuel
7. Blocked fuel filter/supply pump
8. Air in fuel system
9. Water/contamination in fuel
10. Boat abnormally loaded
11. Fouled hull/propeller
12. Engine speed control wrongly ad-
justed
13. Insufficient air supply
14. Too high coolant temperature
15. Too low coolant temperature
16. Too low lubrication oil level
17. Blocked oil filter
18. Defective/wrong propeller
19. Faulty engine mounting
20. Not enough coolant
21. Air in fresh water system
22. Blocked sea water inlet/pipe/filter
23. Circulation pump drive belt slips
24. Defective impeller
25. Defective /wrong thermostat
26. Too high lubrication oil level
27. Alternator drive belt slips
28. Stored diagnostic trouble codes
(DTCs)*
* See the “Diagnostic function” chapter for additional information.
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