well that is why I wrote if it has one. case are good machines and those are simpler than current models. I believe that those use a mechanical injector pump and it should have a manual primer on the lift pump, loosen the fuel line on the outlet side of the manual pump and pump the pump and see if you are getting flow if so go to the next joint all the way to the inlet of the injector pump, it might be a good idea if you do not know when the fuel filter was changed to do that. empty the old filter into a glass jar and look at it see if there is water or excess dirt in it, so you know if it was plugged up or contaminated with water, that will get you going on isolating the problem. good luck