When a glow engine goes just put in a box to keep for parts and get a new engine. A replancement engine is too cheap to spend buckets of money buying parts. I had a SO 50SX go lean in flight (fuel line kinked) and it lost glow plug element and nicked the piston. The only way I could see to repair was to find an old engine, maybe a helicopter engine and scavenge parts. The 50 is a good engine but not any stronger than a Thunder Tiger 46 and the Tiger is cheap. My 50 is still in the box and will remain there.