Re: 1985 Evinrude 9.9 misfire

[Don]

OK, well will it clear out and run up OK at WOT in gear? Or, is this just a problem at lower speeds….
Like I said, I "think" the fuel pump is plumbed into the upper cylinder but could be wrong…A leaky diaphragm could be fouling out the lower cylinder if I am wrong….You could test this theory by unplugging the fuel line and running the engine…If the engine cleans up and starts running right once fuel is pulled out of the line, then we can look into this theory a little more…
How do the plugs look? If the lower plug appears "wet", try tapping it on the palm of your hand…It might be easier to see water droplets this way…