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Troubleshooting
A number of symptoms and possible causes for engine disturbances are described in the table below. For genera-
tor specific troubleshooting, refer to generator documentation. If faults or hitches arise that you cannot solve alo-
ne, you must always get in touch with your Volvo Penta dealer.
Symptoms and possible causes
Starter motor does not rotate when cranking
Starter motor rotates slowly when cranking
Engine does not start
Engine is difficult to start
Engine starts but stops again
Engine does not reach correct operating speed
Engine runs unevenly
Engine knocks
Engine vibrates
Engine does not stop
High fuel consumption
Black or dark gray exhaust smoke
Blue or white exhaust smoke
High lubrication oil consumption
Lubrication oil pressure too low
Coolant temperature too high
Coolant temperature too low
No charge or poor charge
1. Defective starter
2. Flat batteries
3. Poor contact/broken cables
4. Main switch turned off
5. A fuse/circuit breaker has blown/tripped
6. Lack of fuel
7. Blocked fuel filter
8. Defective fuel filter
9. Blocked fuel pipes
10. Defective fuel pipes
11. Blocked fuel supply pump
12. Defective fuel supply pump
13. Blocked fuel injection pump
14. Defective fuel injection pump
15. Blocked fuel injectors
16. Defective fuel injectors
17. Incorrect valve clearance
18. Incorrect fuel injection timing
19. Low compression pressure
20. Improper fuel oil
21. Improper lubrication oil
22. Air in fuel system
23. Water/contamination in fuel
24. Engine speed control wrongly adjusted
25. Insufficient air supply
26. Too high coolant temperature
27. Too low coolant temperature
28. Too low lubrication oil level
29. Lubrication oil leakage
30. Worn cylinder liners and/or piston rings
31. Worn valve stem seals
32. Blocked lubrication oil filter
33. Radiator blocked
34. Faulty engine mounting
35. Too low coolant level
36. Air in fresh water system
37. Blocked sea water inlet/pipe/filter
38. Circulation pump drive belt slips
39. Defective cooling water pump
40. Defective/wrong thermostat
41. Too high lubrication oil level
42. Defective lubrication oil pump
1,2,3,4,5,
1,2,3,21,45,46
7,8,9,10,11,12,13,14,19,20,22,23,25,47,54
7,8,9,10,11,12,13,14,19,20,22,23,25,47,48
7,8,9,10,11,12,13,14,19,20,22,23,25,47
48,49
7,8,9,10,11,12,13,14,17,18,19,20,21,
22,23,24,25,30,33,54
7,8,9,10,11,12,13,14,15,16,22,23,25,26
48,54
20,26,49
8,16,22,30,31,34
2,3,4,5,50
12,14,16,18,19,20,25,27,30
12,14,16,17,18,19,20,25,27
16,18,19,20,21,27,30,40,41,48,54
21,29,30,31,41
21,28,32,42,43
33,35,36,37,38,39,40,51
40
2,3,44,52,53
43. Defective relief valve
44. Alternator drive belt slips
45. Clutch is engaged
46. Defective bearings or abnormal cylinder
friction
47. Fuel supply pump strainer blocked
48. Very cold engine and lubrication oil
49. Heavy initial load
50. Engine consume lubrication oil or combus-
tible gas
51. Cylinder liner have scalings or such that
reduce cooling effect
52. Alternator/Rectifier broken
53. Faulty governor
54. Broken piston
67
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