1988 21' Larson cuddy

by Waker
(Burlington, Vt)

I own a 1988 21' larson cuddy. I do a lot of wakeboarding with it and it normally has a pretty decent hole shot. However for the past few weeks, when I hit the throttle it really has a tough time. The boat starts fine and runs at top end fine, but when I hit the throttle it doesn't have any power. Today for the first time it started 'pinkin' after i turned it off. it has only done that once and didn't do it again for the rest of the day. I thought my problem was moisture in the gas but after today I don't know whether it is the timing off slightly, or something in the electrical, distributer or if I just haven't sacrificed enough virgins to the boat gods this year. If you could point me in a direction that would be outstanding. thanks