Troubleshooting; Symptoms And Causes - Volvo Penta TAMD74A-A Operator's Manual

Troubleshooting

A number of symptoms and possible causes for engine disturbances are described in the table below. If faults or
hitches arise that you cannot solve alone, you must always get in touch with your Volvo Penta dealer.
WARNING! Read the safety directions for maintenance and service in the chapter "Safety information" be-
fore starting work.
Symptom and possible cause
Engine can not be stopped
Starter motor does not rotate
Starter motor rotates slowly
Engine does not start
Engine starts but stops again
Engine is difficult to start
Engine does not reach correct operating speed at full throttle
Engine knocks
Engine run unevenly
Engine vibrates
High fuel consumption
Black exhaust smoke
Blue or white exhaust smoke
Oil pressure too low
Coolant temperature too high
No charge, or poor charge
1. Flat batteries
2. Poor contact/broken electrical
cable
3. Main switch turned off
4. Control lever not in neutral
5. A fuse has tripped
6. Any alarm/message not con-
firmed after autostop*
7. Lack of fuel
8. Blocked fuel filters/supply pump
9. Air in fuel system
10. Water/contamination in fuel
11. Boat abnormally loaded
12. Fouled hull/propeller
13. Engine speed control wrongly
adjusted
14. Insufficient air supply
15. Too high coolant temperature
16. Too low coolant temperature
17. Too low lubrication oil level
18. Blocked oil filters
19. Defective/wrong propeller
1, 2, 3, 5
1, 2, 3, 4, 5, 6
1, 2
7, 8, 9, 10
8, 9 , 10, 14
8, 9 , 10, 14
8, 9, 10, 11, 12, 13, 14, 19
15
8, 9, 10, 14, 15
19, 20
11, 12, 14, 16
14, 16, 19
15, 16, 27
17, 18
21, 22, 23, 24, 25, 26, 27
2, 28
20. Faulty engine mounting
21. Not enough coolant
22. Air in fresh water system
23. Blocked sea water inlet/pipe/filter
24. Circulation pump drive belt slips
25. Defective impeller
26. Defective /wrong thermostat
27. Too high lubrication oil level
28. Alternator drive belt slips
* Electrical system with autostop function
(optional).
63