Greetings. My 1982, 115hp Johnson is fouling all 4 plugs after a day or so use. Oil mixture is 50:1. Thick, sticky oil running down outside of engine case after use too. Compression is 110 on 3 of the cylinders and 95 on 1. Always seems to run a bit rough too but I'm guessing that could come from the low compression on one of the cylinders. Any thoughts?