I'm at the place where I just can't take it any more. This keeps happening over and over I replaced all 4 coils, cleaned carbs, added filter, replaced fuel pump. Fixed what I thought was a kink in the fuel hose at lower carb. I replaced plugs by the boxes. I checked compressionit's good. This thing runs like a rabbit then like a duck. When I remove the bottom spark plug wire to the bottom port side cyl. there is no change in rpm like on the rest of the cylinders. Then it works fine for a while. Todays fishing trip was a desaster my 1996 6 horse johnson is still overheating (hot water from pee hole)after new waterpump and thermostat.*_(#$(*#@^%#^#%*^$*^$^##&%^^*&*&!!!!!!!