Maybe someone can help me. I just picked up an 84 bayliner with a force 50 on the back. It fires right up and idles but gets a miss when it warms up. When I throttle it up the miss gets worse. It runs great for a few seconds and has a dead miss that almost kills the motor. I replaced the plugs and put food fuel in it. The lower unit is leaking black exhaust juice but I think that is a separate issue and the gasket is bad.