ORIGINAL: SCOTT42
LOL, john you had me worreid there for a moment, Paul ive changed many sets of bearings and thats not a problem to do I just havent figured out why its running so hot? I do have some klotz oil , havent tried none of that yet its still mounted in the run up stand so I will give it another go first chance I get, as of now Ive got a 14-6 prop on it thinking it would not wind it up to a high rpm when its running.
I remember now it was Klotz castor. When mine first ran hot a guy at the field walked up and told me, "put a little Klotz in it until you get it broken in, it will run cooler and don't let it get too hot in the cowl" and I did that also changing the mixture.
Made the difference in the long run and like I stated it is the best 91FX I have had now...very smooth runner. If you have not damaged the engine you will be fine once you get her broken in. I ran a huge amount of fuel through mine before it got broke in. I bet it was two or more gallons - about a gallon or so on the bench and then at least a gallon or more in the air. She has that OS "pop" now [8D]