Yanmar 3JH4E - Page 87

Symptom Probable Cause Measure Reference
Abnormal Exhaust Color:
• Black smoke Load increased. See your authorized
Yanmar marine dealer or
distributor.
-
• Improper propeller matching. See your authorized
Yanmar marine dealer or
distributor.
-
• Dirty intake silencer (air
cleaner).
Clean element. See Cleaning the
Intake Silencer
(Air Cleaner)
Element on page
72
• Improper fuel. Replace with
recommended fuel.
See Diesel Fuel
Specifications on
page 27
• Faulty spraying of fuel injector. 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
Specifications on
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
JH4 Series Operation Manual 81