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 any problems occur which you cannot solve by yourself.
NOTICE! Read the safety regulations for care and maintenance in the Safety precautions for maintenance and
service operations chapter before work you start work.
Symptoms and possible causes
Start motor will not turn, or turns slowly 1, 2, 26
Engine does not start 3, 4, 5, 6, 7, 8, 27
Engine starts but stops again 5, 6, 7, 8
Engine is difficult to start 5, 6, 7, 8
Engine does not reach correct operating speed at full throttle 6, 7, 8, 9, 10, 11, 12, 17
Engine knocks 13
Engine runs roughly 5, 6, 7, 8, 12, 13
Engine vibrates 17, 18
High fuel consumption 9, 10, 12, 14, 17
Black exhaust smoke 4, 12, 14, 17
Blue or white exhaust smoke 14, 24
Lubrication oil pressure too low 15, 16
Coolant temperature too high 19, 20, 21, 22, 23
No charge, or poor charge 1, 25
1. Flat battery
2. Poor contact/open circuit in cables
3. The stop lever is pulled out
4. Insufficient preheat
5. Lack of fuel
6. Blocked air filter
7. Air in the fuel system
8. Water/contamination in fuel
9. Boat abnormally loaded
10. Fouling on hull, drive or propeller
11. Limited movement in engine control lever
12. Insufficient air supply to engine
13. Coolant temperature too high
14. Coolant temperature too low
15. Oil level too low
16. Blocked oil filter
17. Faulty / wrong propeller
18. Faulty engine mounting
19. Coolant level too low
20. Blocked raw water inlet, lines or filters
21. Circulation pump drive belt slipping
22. Faulty impeller
23. Faulty / wrong thermostat
24. Oil level too high
25. Alternator drive belt slipping
26. Time limit for cranking the starter motor
27. Stop solenoid has stuck
Fault handling
44 47711262 01-2019 © AB VOLVO PENTA
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