Problems starting 2800 Cummins-Onan gas generator

Cummins diagnosed mine, called me with the estimate and when I told them to go ahead and repair it the Diagnostic Fee was subtracted from the total bill. While I hate spending money I would rather spend it with someone who knows what they are doing and get it repaired correctly instead of the "Well, it might be carb" or some such. Mine was the fuel pump, pricey little bugger but runs fine now. Money well spent. Good Luck and travel safe. Bob J.