Yanmar 3GM30F heavy smoke at high RPM
Posted: Mon Jul 26, 2021 6:28 pm
All,
Sorry if this has been posted before. However I wanted to share with you a recent experience that I had with my Yanmar 3GM30F. Anytime I would try to go over 2600 RPM I would blow heavy smoke. After many hours and many dollars, I discovered the issue was caused by the mechanical fuel lifter pump. It seems to be a common problem with these pumps. The problem is when the diaphragm becomes compromised and the engine oil is at full capacity, oil is is allowed to migrate into the fuel system. Once I changed the pump it resolved the issue. It should be noted that the pump I replaced was new out of the box.
Sorry if this has been posted before. However I wanted to share with you a recent experience that I had with my Yanmar 3GM30F. Anytime I would try to go over 2600 RPM I would blow heavy smoke. After many hours and many dollars, I discovered the issue was caused by the mechanical fuel lifter pump. It seems to be a common problem with these pumps. The problem is when the diaphragm becomes compromised and the engine oil is at full capacity, oil is is allowed to migrate into the fuel system. Once I changed the pump it resolved the issue. It should be noted that the pump I replaced was new out of the box.