well to tell you the truth, im clueless to "what" it "was" keep foolin around and like the snap of the finger it sarted running right, im stumped, lol. But like always before the rebuild and after the ol' SC turns a little over 10 thousand R's on the ground with a 17x6 APC prop, just where I like it. Kills my heart to see these engine run at anything under 9,300 or so.