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This is a 25hp and I have already rebuilt carb and installed new plugs and wires and 2 new coils,
she idles ok and has smooth mid range but WOT misses and smokes bad, hurts to hear it. Replaced with new oil and gas in tank (non ethanol) could it be the control box? Anyone got some info? Im ready...
My 25hp mercury was running great then it just took a crap runs rough and only has half power at full throttle. Any one have a place to start? carb or power head? just put new plugs in prior to the problem, and bottom plug seems oily.
