Endeavour
RC Newbie
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Hi all, this is my first post here, I bought an O.S 21tm two years ago when I was new to the hobby, I bought it to replace the TRX 3.3 in my Revo, I used the heat cycle method to break it in and it is still running great however I've notice that it is fairly easy to spin th flywheel over by hand, I've done every compression test: the liner test where you push the piston up through the sleeve and there was still about a centimetre of space between the top of the piston and the liner, I also cannot spin the engine over with my pinky finger, is my engine on its way out?