The Cummins 12 valve is about as simple as a diesel engine gets. It doesn’t need electronics to run. Most of them do have a fuel shutoff solenoid, but it’s just a simple electromagnetic plunger. No computers. No sensors deciding if you’re allowed to drive. You can remove the solenoid entirely and shut the engine down with a manual cable that physically cuts fuel. Same engine, still runs. Still reliable. They usually come with an electric starter, but even that isn’t required. You can swap to a p