I have a Jeanneau 43 DS with a Yanmar JH series diesel engine. The model is 4JH3(C)E 56 HP and it has run for only 600 hours.
I have had a recurring fuel starvation problem with the motor for the past 9 months.
In smooth water she runs like a dream.
In rough water the engine coughs, sputters and dies. It will start again and runs for a while but dies again. The engine runs for shorter and shorter periods between stall.
I have cleaned out the plastic 200L tank which had some sediment but no stickey gooey material. It is now clean as a whistle.
I changed the primary Racor filter which had some contamination but no water before setting out today, and during the time the motor was misbehaving. There was a slight improvement after the filter change but starvation and failure soon occurred again.
There was no water or other contaminants visible in the bowl.
I also changed the secondary filter on the motor.
This problem has me flummoxed. Everything is clean. So why the problem? The motor is "self bleeding" and has never been a problem before.
What should I do.
SV More Magic