Hi All,
I have a T-Rex 600 Nitro with an Align/OS Hyper 50 in it.
Its had 6 or so tanks through it and has run like a clock. Yesterday, It leaned out and stalled. I managed an Auto and landed safely. The motor was hot but not seized. After it cooled I couldn''t start it again.

Check list:
Changed Glow plug 3 times
compression seems ok
Clean filters and clunks
fuel lines ok Engine is getting fuel
removed and cleaned engine and carb 3 times
Just won''t go! not even a kick

How do I tell if the ring is damaged? The piston seems a bit discolored and has some scratches on it.
Can this cause the engine not to start?

cheers
CJ