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Message: <blockquote data-quote="doc1976" data-source="post: 490210" data-attributes="member: 13441"><p>As the title says 78 9.9 it has a misfire at wot have only run the motor in a test tank or with earmuffs on so far. Starts good idles fairly smooth. The motor has sat for 20 year or so according to the seller. I've cleaned/rebuilt the carb, adjusted the carb/timing sync. New plugs (correct plugs) new water pump, lower unit lube changed. New fuel pump and lines. At wot, it has the misfire, like one of the cylinders is not firing everytime. I have not figured out which cylinder yet, looking for any input. I'm thinking maybe one of the coils is going bad? All wires appear good. Thanks in advance.</p></blockquote><p></p>