Hello, I am trying to get some helpful information for a farmer friend of mine, He has late 70's early 80's New Holland L-425 with The Wisconsin V4HD engine. He has replaced the following parts- Coil, Starter Solenoid, and Fuel Pump. His Problem is that after running normally for an hour or so it will shut down, after waiting for a short period of time about 20 mins or so, it will start and run again for the same hour and repeat this cycle. I am thinking it is something getting hot and causing this, seems almost like ignition or fuel related to me. Anyone that could possibly point me to a more specific problem or cause, I would Greatly Appreciate ANY Input or Information. Thank You Very Much In Advance!!!!! John Sisson, MY friend Kevin will also be very Thankful!!!