B
Bob Willett
I have a 40.5 and have been experiencing a problem with my yanmar 4 banger. The engine starts fine and runs well as long as you keep it around 1000 rpm if I run it up to about 2000-3000 it runs for about 5 min then drops down to 1000 or less the stays there and if the throttel has not been moved races back to 3-4 k and then drops off again if I keep the revs up it will eventually die. I had a mech look at it and he coundnt come up with a problem. I have bleed the lines and checked the fuel filters several times. I have checked to see that the vent line was clear also. Anybody out there know something that I might be mising. It is a real inconvience not to be able to run the engine above 1000 rpm.