My boat has been sitting for about 2 months. I went to run the Yanmar 3GM30 tonight and this is what happened. Starts fine, idles and runs great when not in gear up to 3,000 rpm. In gear, piles of black smoke and won't run more than 2,000 with almost no forward propulsion. Fuel looks good. New filters this season. Had a lot of work done last winter including new SS elbow and exhaust manifold, rebuilt and pop tested injectors and cleaned and tested cooler. Good cooling water flow. It ran great all summer including a 6 day trip with lots of motoring.
Stuck injector? Any thoughts?
Stuck injector? Any thoughts?