They have a cummins I think. Not sure if it would have a manual fuel bypass or not. My old 730 Champion had one on the back of the pump, and so does our Alitec grader. I've had problems with cummins engines before, and had to open the fuel shutdown manually, but I am sure that someone on here can answer your question more indepth. Not sure about that model, but there should be a solenoid on the injection pump that opens the fuel when the key is on. Not sure about your's, but you used to be able to tie the lever open by hand, and she would start, but you would have to release it in order to shut her down.