Thank you 78buckshot. Will get back to it and take all this into consideration. Fuel supply is 1" to outside and breaks down to 3/4" galvanized on approach to generator. We checked supply with a manometer and it seemed good. This is running on natural gas. My serial # is 50016226. Thank you again for your time and fast response.
I'm thinking there's something about galvanized pipe that can contaminate fuel.
Not sure about LPG or NG, but I know it will ruin diesel fuel, and any engine you put it into, very quickly.