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 that 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
Engine cannot be stopped 2
Starter motor does not rotate 1, 2, 3, 6, 7, 9, 10, 35, 3
Starter motor rotates slowly 1, 2
Starter motor rotates normally but engine does not start 11, 12, 13, 14, 37, 38
Engine starts but stops again 4, 11, 12, 13, 14, 19, 36
Engine does not reach correct operating speed at full
throttle
5, 12, 13, 14, 15, 16, 17, 18, 19, 20, 23, 33, 36, 38,
Engine runs unevenly 5, 14, 15,
Engine vibrates 24
High fuel consumption 15, 16, 18, 21, 36
Black exhaust smoke 19
Blue or white exhaust smoke 21, 34
Lubricating oil pressure too low 22
Coolant temperature too high 25, 26, 27, 28, 29, 30, 31, 32
Coolant temperature too low 31
No charge, or poor charge 2, 8
1. Discharged batteries
2. Poor contact/open circuit in cables
3. Main switch in off position
4. Shut down system activated
5. Check valve in feed pump leaks
6. Control lever not in neutral/helm station not activated
7. Faulty shutdown relay
8. Alternator drive belt broken/slips
9. Faulty starter relay
10. Faulty starter motor
11. Lack of fuel
- fuel taps are closed
- fuel tank is empty
- wrong tank connected
12. Blocked primary fuel filter/secondary fuel filter
(due to contamination or paraffin precipitation in the fuel at low temperatures)
13. Air in the fuel system
14. Water or contaminants in fuel
15. Boat abnormally loaded
16. Fouling on hull/propeller
17. Cables for unit injector damaged (open circuit)
18. Faulty unit injector
Fault handling
48 47710406 10-2018 © AB VOLVO PENTA
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