Well I tried to run it again today and there is definitely a problem internally. I can get it started and it idles - almost like clockwork when it gets to about 160 the idle starts going up and end then becomes impossible to slow down - then the temp starts rising fast and it flames out or I shut it down before it really starts screaming. I don't think it's an air leak since its brand new and worked fine until the end of the 5th break in tank. I think it's a rod bearing or rod issue but I won't take it apart because I think Horizon should warranty it. Something went south very fast with this engine after it was broken in carefully. After it got stuck at BDC I knew this would not be a good ending. We shall see what Horizon says, I am shipping the engine to them tomorrow.