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Fault Handling
A number of symptoms and possible causes of engine malfunctions are described in the table below. Always
contact your Bukh dealer if problems occur which you can not solve by yourself.
Read through the safety advice for care and maintenance work in chapter Safety precautions for maintenance
and service operations before starting work.
Symptoms and possible causes
Pop-ups are shown in the tachometer display
Starter motor not turning (or slow)
Engine does not start
Engine starts but stops again
Engine difficult to start
Engine does not reach correct speed at wide open
throttle (WOT)
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 charge or poor charge
1.
Flat batteries
2.
Poor contact/open circuit in cables
3.
Fuse tripped or faulty relay
4.
Lack of fuel
5.
Fouled fuel filter
6.
Water/contaminants in the fuel
7.
Leakage in the fuel system
8.
Boat abnormally loaded
9.
Fouling on underwater hull/propulsion unit/
propeller
10. Insufficient air supply
11. Engine coolant temperature too high
12. Engine coolant temperature too low
70
Fault Tracing
See chapter Fault Code Register
1, 2, 3, 24
3, 4, 5, 6, 7, 24
6, 7, 24
4, 5, 6, 7
5, 6, 7, 8, 9, 10, 11, 15, 18, 19, 20, 21, 24
4, 5, 6, 7
4, 5, 6, 7, 10, 11, 17, 18, 20
15, 16
8, 9, 10, 12, 15, 21
10
12, 21, 22
13, 14
17, 18, 19, 20, 21
2, 23
13. Lubricating oil level too low
14. Blocked oil filter
15. Defective/incorrect propeller
16. Defective engine mounting
17. Too little coolant
18. Blocked seawater intake/pipe/filter
19. Circulation pump drive belt slipping
20. Defective impeller
21. Defective/incorrect thermostat
22. Lubricating oil level too high
23. Alternator drive belt slipping
24. Stored diagnostic fault codes
The codes can only be read and erased by a
service technician.
47708085 11-2016 © Bukh
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