I know, I know, I'd never buy one but this one arrived from a neighbor!
The outlet copper tube is held in place and sealed by a small rubber gasket, looks like an 'O' ring with a molded on flat spot on one side. All of this sets into a grove in the cast aluminum (??) head. Head gets hot, vulcanizes the rubber, rubber gets hard, tube gets spit out of the head. New gasket is $2.16 plus S&H, no delivery date, not available locally.
Proper fix is to drill and tap for a 5/16" compression or flare fitting, not enough thickness to get a realiable thread. Plus I'd still have to seal up the old slot. JB Weld to goop in proper fitting has some merit but that brings up a few questions:
1) Would it hold up to the heat? 2) Would it hold up to the vibrations/pressure? 3) Is there something better than JB Weld for this??Worst case is I order the gasket, install, and send it back with an "I don't want to see this again"