I have a 2000 OceanPro 250. Last season I burned #5 and needed a new powerhead. The mechanic rebuilt the carb on that cylinder, updated the needles on the others. The motor ran flawlessly for 100 hrs and now has burned #1 around the edges. In both cases no alarms, no warning just lost RPMS and that was it. I suspect a lean condition , possibly ethanol related. Anyone else seen issue like this will crossflow carbed 2 strokes ? I'm debating not fixing the motor even though its an almost new powerhead if I can't some up with some valid reason why this happened again