i have been messing with my 1992 100.well i thought i had used alot of oil but my brother had used the boat and did not refill the oil.today i put new plugs in it and took it for a ride when i got home i pulled all the plugs. all of them had what looked like oil on them. they still looked new did not have any black like it was running rich just looked like oil.is there a way to adjust how much oil it put out.thanks for any help josh