Sloan Flushmate continues to run

Water is leaking into the bowl past the flapper I presume.

Never seen that. Don't know what to tell you then. Youtube it

Somewhere is a threaded rod that is the adjustment for how high the floater gets before turning off the refill. If it is too loose, the refilling water is never turned off and the extra water runs into the overflow, usually a open-ended vertical pipe. You need to tighten down that float so that it will Engage The off switch before the water is deep enough to run out of the Overflow

I ordered a replacement cartridge since apparently they need to be changed every 5ish years, and I know I haven't replaced it since I've been in this house. Stupid design. Stupid product. Can't believe someone thought this was actually something they believed the world needed.

The part to activate the water release is a little loose, so maybe that will solve it, but either way this is an idiotic product.

Replace the cartridge and it will stop running. 5 minute fix

Coburns also has the wrench to change the cartridge but I always used needle nose pliers

I had to replace the cartridge on mine and it stopped running. And I like this thing, it's loud but you could flush a bag of marbles if you had too, it is powerful. No worries about the return of the black banana.