Counter weighted MT 3 blade prop. Cold oil it spins right up to 2700. Once the oil warms up it only gets to 2680. If the oil gets very hot >220 it will only reach 2650. I read somewhere that these governors have a seal that can leak internally and cause this issue. The RPM is rock steady at my typical cruise setting of 2350. Are these governors rebuildable? Should I just replace it with a new one? Would it be better to switch to the MT?