parker....i guess you got mistakes on the break in process of your axial engine...according to you it never goes above 230... am right. I appreciate axial engines....powerfull its not just cheap engine...breaking in at low temp is a no no no ....at low temp the sleeve doest expand....so you just spoil your piston (wear out) next time you got a new engine, broke it with high temp...I'd rather see it overheat than to seat on it. good luck...