Fault-tracing
1. Flat batteries
2. Poor contact/open circuit in cables
3. Main switch turned off
4. One of the circuit breakers in the distri-
bution box has tripped.
5. Faulty key switch
6. Control lever not in neutral/control po-
sition not activated
7. Faulty stop relay
8. Faulty main relay
9. Faulty starter relay
10. Faulty starter motor relay
11. Faulty starter motor/solenoid
12. Lack of fuel:
– fuel taps closed
– fuel tank empty/wrong tank con-
nected
13. Blocked fine fuel filter/pre-filter
(caused by contamination or fuel strati-
fication at low temperature)
14. Air in the fuel system
15. Water/contamination in fuel
16. Boat abnormally loaded
17. Fouling on hull/propeller
18. Faulty injectors (nozzles)
19. Insufficient air supply to engine:
– blocked air filter
–air leakage between turbocharger
and engine inlet pipe.
– fouled compressor section in turbo-
charger
– faulty turbocharger
– poor engine bay ventilation
20. Excessive coolant temperature
21. To o low coolant temperature
22. To o low oil level
23. Faulty / wrong propeller
24. Faulty engine mounting
25. Coolant level too low
26. Air in the freshwater system
27. Faulty circulation pump
28. Closed seawater inlet
29. Blocked seawater inlet/pipe/filter
30. Defective impeller in seawater pump
31. Defective thermostat
32. Blocked heat exchanger insert
33. Blocked aftercooler
34. To o high oil level
35. Alternator drive belt slips
36. Water entry into engine
37. High back pressure in exhaust system
38. Stored fault codes*
39. Check that the emergency stop button
is in the running position (not pressed
down).
40. Engine drive belt slips
* NOTE! The codes can only be read
and erased by a service technician.
Please refer to the “Diagnostic informa-
tion” chapter for further information.
Symptoms and possible causes
Pop-ups in EVC system tachometer display Please refer to “Diagnostic information”
Engine can not be stopped 2, 4, 5, 7
Starter motor does not rotate 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 36, 38, 39
Starter motor rotates slowly 1, 2
Starter motor rotates normally but engine does not start12, 13, 14, 15, 38
Engine starts but stops again 12, 13, 14, 15, 19, 38
Engine does not reach full operating speed at full throttle 13, 14, 15, 16, 17, 18, 19, 20, 23, 33, 37, 38
Engine runs unevenly 14, 15
Engine vibrates 24
High fuel consumption 16, 17, 21
Black exhaust smoke 19
Blue or white exhaust smoke 20, 21, 34
Lubrication oil pressure too low 22
Coolant temperature too high 25, 26, 27, 28, 29, 30, 31, 32, 40
Coolant temperature too low 31
No charge or poor charge 2, 35
WARNING! Read the safety directions for maintenance and service in the chapter “Safety information”
before starting any work.
NOTE! A number of symptoms and possible causes of engine malfunctions are described in the table be-
low. Always contact your Volvo Penta dealer if problems occur which you can not solve by yourself.
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