This video explains how the mechanical fuel injection system works on a Bobcat CT1021 and CT1025 tractor. It really describes how all small diesel engines with mechanical fuel injection works. I had a problem where the engine would not start or stay running. I could not hear the electric fuel pump ticking so I replaced it and the fuel filter. Works like a champ now. Replacement fuel pump:
https://www.amazon.com/dp/B08PY7V2MM?...