Hello, I'm trying to find out information for a farmer friend of mine, He has a New Holland L-425 {not sure of year} late 70's early 80's, The engine Wisconsin v4HD, The problem is it has a stalling problem after about a hour of operation, After letting it set for a short period of time around a half hour it will restart and follow the same course of stalling. He has change the Coil, Fuel pump, Starter Solenoid. I suspect that there is something getting to hot and shutting it down. Just looking for any type of information or suggestion on where to start looking first. Any replies will be deeply appreciated. Thank You, John