Just bought this ski from someone. We replaced the key and fuel control cleaned the carbs and cables. The ski starts right up. Had good compression. Took it for a ride. It took off went to open the throttle all the way and it bogged down. Let up on the throttle accelarated and it took off went a few seconds and bogged down again. Would take off and bog down. I put premix thinking since the ski was sitting for awhile to run richer would not hurt. Also on the exhaust there is a patch with an epoxy. It is dripping a bit water but a not a stream just drops. Anyone with a suggestion here?