Please help. I own a Bayliner Jazz with a sport jet 90, 3 cyl, 2 stroke. the boat runs, but only on 2 cylinders. the middle cylinder won't fire. It appears that there is no spark, even with new spark plug. When i crank the engine with the spark plug out, there is only one initial spark, but no spark as soon as the engine is running. I'm at the end of my wits with this thing and am in desperate need for help. thanks.
