RE: Weird engine/glow plug trouble
I had the same thing happen with a os 8 plug on a os 55. It would start and run, but I noticed it had a power loss. After landing and getting on the stand I hand spun the prop and compression was almost gone. I thought it was dead, got it home messed with it and could hear the air coming out the top of the head and found it was coming through the glow plug. New glow plug and it runs great