I normaly run cool power 15%, but recently tried some cp 30%, i changed the plug, which is an os # 8. I haven't changed the fuel lines, i have about three gallons of fuel through it. I flew it again tonight and I think the clutch is making some noise, Im afraid its the famous wah wah. Also I measured the engine temp, its running around 185 F. I think this is too cool so ill try leaning it out a bit.

Oh yeah as far as full power climb outs go, it does seem to have a reduction in power. Just kind of weird because everything was fine yesterday. Anyone think the change in fuel could be the cause?

Thaks for the help!!!!! I'll try all the posted suggestions and let you know what works.