Re: 1989 evinrude, 110 hp. spark plug help
Champion QL77JC4 gapped at .030, if you do a lot of slow speed running, trolling etc, gap at .035, will cut down on fouling. also doing a decarb will get the carbon out of the combustion chamber, and cut down on fouling.
Decarb, take a can of seafoam put 3/4 of it in the gas tank, with only 1 gallon of premixed gas. put the rest in a spray bottle. start the engine, and let it come up to temperature. then remove plugs, and them some real good shot of seafoam into the cylinders, replace plugs, let sit 15 minutes. restart, and spray the rest of the seafoam into the carbs, so the the motor almost stalls, wait and repeat until the seafoam is gone.then take for a wide open spin. then put in new plugs, ad premixed gas to the tank, and take it for a wide open throttle spin. it is going to smoke like a house on fire, during this process.
afterwards compression.recheck
