RE: Weird engine/glow plug trouble
One Sunday, many moons ago out at the field, a friend was running-up his engine...getting ready for a flight...when POP...it sounded like a muted firecracker or something...
As the engine windmilled to a stop, we walked toward it, wondering what happened...
The glow plug core / center stem had popped out and flew off somewhere!
It was an upright engine, and by the sound it made, it musta went 20 or 30 feet in the air...