Re: Need some Help on this 4hp Evinrude
Well I just ordered the carb kit so as soon as I get it I'll be throwing that on there and seeing if it improves it much.That would be better but not to worry. Different procedures and gauges produce different results. At least the two cylinders are very close in numbers which is a good thing. After I did a seafoam decarb on mine the compression improved by 15 to 20 lbs. Hopefully it will loosen up you rings as well. Your spark should jump 3/8ths. gap and be blue/white in color and really snappy. I think your problem is in the carb. though. Rick.