Symptom
Probable Cause
Measure
Reference
Abnormal Exhaust Color:
• Black smoke
Overload
Reduce load.
-
Improper propeller matching.
See your authorized
Yanmar Marine dealer or
distributor.
-
Dirty air cleaner.
Clean air cleaner.
page 66
Improper fuel.
Replace with
recommended fuel.
See Diesel Fuel
page 27
Faulty spraying of fuel injector.
See your authorized
Yanmar Marine dealer or
distributor.
-
Low boost pressure.
See your authorized
Yanmar Marine dealer or
distributor.
-
Incorrect intake / exhaust valve
clearance.
See your authorized
Yanmar Marine dealer or
distributor.
-
• White smoke
Improper fuel.
Replace with
recommended fuel.
See Diesel Fuel
page 27
Faulty spraying of fuel injector.
See your authorized
Yanmar Marine dealer or
distributor.
-
Fuel injection timing off.
See your authorized
Yanmar Marine dealer or
distributor.
-
Engine burning oil (excessive
consumption).
See your authorized
Yanmar Marine dealer or
distributor.
-
TROUBLESHOOTING
76
6LPA Series Operation Manual
© 2007 Yanmar Marine International