I'm glad to have found this forum since i've been having problems with my GMS-76.

I found some tips about a year ago, to seal up the engine, and have done that.

Mine was running hot and quitting at full power.
i was about to trash it.

i'll try these tips and see what happens.

My application has the engine mounted pointing up, with a tank mounted "tubes up" on the engines' belly. I do have some foam between them.


THANKS.