I was finishing up the engine install on my new Ultra Stick 40 yesterday and tightening up the prop when I heard a pop. I thought it was possibly just the front bearing seating.
Went outside and cranked the engine up which died after a few seconds and threw the prop.

I removed the glow plug and tried to twist the shaft with my fingers and found the engine to be grinding (internally) so badly that it will not turn completely.

This is a brand new OS 46 AX.

Did I kill it? Not sure how tightening a prop would break an engine.

Thanks in advance,
Hank