Fault-Tracing - Volvo Penta D1-20 Operator's Manual

Fault-tracing

A number of symptoms and possible reasons for engine problems are described in the table below. In case of
faults or mishaps which you cannot solve, always contact the Volvo Penta dealership.
WARNING! Read the safety precautions for maintenance and service in the chapter: Safety Information,
before starting work.
Symptoms and possible causes
Starter motor not turning or slow
Engine will not start
Engine starts but stops again
Engine difficult to start
Engine does not reach correct speed at full speed
Engine knocks
Engine runs unevenly
Engine vibrates
High fuel consumption
Black exhaust smoke
Blue or white exhaust smoke
Low oil pressure
Engine coolant temperature too high
No or poor charging
1. Discharged battery
2. Loose connection/open-circuit
3. Fuse tripped
4. Stop control pulled out
5. Inadequate pre-heating
6. Lack of fuel
7. Fouled fuel filter
8. Air in the fuel injection system
9. Water/contaminants in the fuel
10. Boat abnormally loaded
11. Fouling on underwater hull/drive/
propeller
12. Limited speed control lever
movement
13. Insufficient air supply
14. Engine coolant temperature too high
15. Engine coolant temperature is too low
16. Lubricating oil level too low
17. Blocked fuel filter
18. Defective/incorrect propeller
1, 2, 3
4, 5, 6, 7, 8, 9
6, 7, 8, 9
6, 7, 8, 9
7, 8, 9, 10, 11, 12, 13, 18
14
6, 7, 8, 9, 13, 14
18, 19
10, 11, 13, 15, 18
5, 13, 15, 18
15, 25
16, 17
20, 21, 22, 23, 24
2, 26
19. Defective engine mounting
20. Too little coolant
21. Blocked seawater intake/pipe/filter
22. Circulation pump drive belt slipping
23. Defective impeller
24. Defective/incorrect thermostat
25. Lubricating oil level too high
26. Generator drive belt slipping
55