Bob,
I had used PC-7 years ago to repair a 5hp Briggs engine that the connecting rod broke and in turn cracked the case. After disassembly I replaced the rod, etc. and then on the inside of the case I used PC-7 to repair the crack in the case. Held up quite well for a couple of years for a leaf catcher until I got a different mower. The blower/engine is still in my shop, ready to go..........someday.
Thanks for the teflon offer. But I think I can source some locally. I am thinking that a short #8 or #10 stainless Sheet Metal screw with a teflon 1/8" washer would do the trick on the pot. Just round off the point with a grinder and done.
Les