Re: Prochem Everest just shuts down after running for 20 min
How do you know the engine is not overheating - there is no gauge for engine temp.
We had the same issue with ours, what fixed ours was bleeding air trapped in the cooling system. On the helicoil bleed valve, put a small hose on the end, open it up, run the machine.
Catch the coolant as it comes out, and replace it in the radiator directly at the same rate.
I have also had fuel pumps that would stop pumping after a certain period of time as well, something you might consider checking. When it dies, pull the line, see if it pumps. Key on, override switch turned.