Someone please help! I have a 1989 50 HP Force Motor (Model 507X9B) on a Bayliner Ski Boat. I took it to the shop and they said it was not firing due to a bad coil so they replaced it. Took it to the lake and the bottom cylinder still would not fire. Took it back to the shop and they said it was a bad coil they put in so they replaced the coil a second time. Took it to the lake, it cranked up fine and when I ran it down the lake at full throttle, it backed down like it was running out of gas. I was barely running at full throttle. Took it home, replaced the diaphram on the fuel pump, tore the carb apart and cleaned it. Took it back to the lake, same thing. Barely running at full throttle but sounded fine. Pulled the bottom plug wire while running and there was no change in the sound of the motor. So, the bottom cylinder is not firing. Is it the power pack or could it be something else electrical causing the bottom cylinder not to fire. I am getting frustrated!!!
