This engine starts fine, runs well at all speeds, but will not troll at idle for more than a few minutes, then coughs a bit and dies. It starts up right away and repeats 2-3 minutes in and then dies. If I give a bit of gas just before it dies, it'll go again for 2-3 minutes then wants to die. I have it on a small pontoon boat with a separate throttle control and electric start.