I have a 1976 85 hp johnson and it has been running real rough lately. I had it out last night and i could barely get the motor to run in forward. I finally got it to move but it was only going about a quarter of the top speed and wouldnt plane out. I adjusted the throttle cable and i realized that wasnt the problem. I then adjusted the lever connected to the throttle i tried to loosen the plastic clip then put it back on. This adjusted the little roundish piece that says start on it. This made it worse. It also sounded like it was only picking up 2 cylinders . I got the boat out of the water and checked my spark and realized that all plugs were giving a blue spark but one. This one one was only giving a pink spark. Im not sure if that was the problem.