I had an issue with starting my Kioti CK35 in the winter and could not get to work on it then, traced the problem to the Stop solenoid, solid was good and finally found the fault was a corroded positive wire going to the relay. I did initially think the problem was a fuel issue so took out the injector pump, and everything looked good. Now the engine fires up and runs, the throttle works Ok but black smoke and the key will not shut off the engine. The solenoid is working fine, retracting and extending. So any pointers on where to look next would be greatly appreciated, I know my way around a Gas engine pretty well, but this is my first diesel!