Adamzpop

The ski ran great for about 10 min.then started to miss at around 1/2 throttle then cleared up for a few min.then started and kept running rough at anything over 1/2 throttle.took the carb off (single carb)and it was clean as a whistle (filter to)took it all apart anyway and cleaned,good fuel flow from the tank (no restrictions in the "on /off/ res" selector) all new gas lines and gas. Compression is 147 and 150.plugs were new and burning tan/gray.... help!