I have an 86 Johnson 25hp. It idles well but runs rough and misses bad at half throttle. If you keep giving it throttle it comes out of it and runs very well at WOT. It is almost like it is running on one cylinder and all of the sudden the other one kicks in. It does this every time you accelerate. I have rebuilt the carb and the fuel pump and replaced fuel lines and fittings. I recently replaced the power pack also. The way it cuts in an out sunddenly getting to full throttle makes me think it is ignition related. I am tempted to replace coils and plug wires but also think maybe it just needs an adjustment. Anyone have any thoughts.