this vids gonna take a while so i'll entertain with my good engine gone bad.
My Leo 37SF has been the best cheap engine i've ever had, as good as any Irvine at 50% more cost. a couple of weeks ago it started making weird noises and blowing plugs, the bearings had finialy gone. i sent it off, and the reply was, it's screwed. i brought a new one ( discounted ) plus got the old one back. the rear bearing has completly lost the cage, some if it had gone up through the ports, some was making a new home in the bottom of the engine, my bearing now conisted of loose balls between the rings! wedged up in the top of a port was also a bit of the head fins!!! i knew it fell off a few months ago, maybe 7-8 months. i thought it went in the grass, but it had worked it's way through the carb and nesseled in the port to live the rest of it's life watching the piston bounce up and down 13,000 times a minute just outside it's window.

During all this the engine still ran, all be it a bit hot and noisey!