https://youtu.be/kZ_Q4vs_Iv4 just ran this engine tonight, I did take the fuel line off, and found a piece of debree like plastic in the fuel line right before the nipple on the carb??? Maybe that was my problem however, does not explain the push rods coming off in flight, on Wednesday, my other concern was that the cowling is so close to the rocker arms maybe 2 mm or less from the rocker arms, could it have caused a rocker arm to touch and possibly come off because of that?? And my RPMs are still low compared to what it used to run, before like last year, it was turning the same prop 26x10 @ 4800 to 4900?? Same fuel 10% nitro 9% oil ritches brew for theses engines.... What do you guys think??? https://youtu.be/3CeGmCeus0c https://youtu.be/oy1Agz1sv_w