ok.. I think I understand now.. I've never seen a threaded on flywheel.. are you sure.. if it is true.. use some after run oil.. take out the glow plug.. look in the exhaust port and make sure the piston is close.. not at... top dead center.. and fill the combustion chamber with the after run oil.. then replace the plug.. you are now hydrolocked and can apply a wrench to the crank.. I use this method when I don't have a flywheel wrench available..
ok i got if off by using hte mallet thing after unthreading hte pilot shaft with an allan wrench (for all the other losi ppl who can't get it off) the engien is great but im hooking it up with an os cvx 12 engien that was ported