It just so, that I was at my dealer a few months back, getting my windshield installed. I seen the shopmen putsome of the RTV's together, they pouredmaybe, if even that much, two gallons into the that tank, and as soon as the engine seemed to spin, BAM, she fired up. So I take that one does not have to pump or prime the engine that much. I was impressed for the thought has went threw my mind if one runs out of fuel, he will have to go threw the primingprocess as they do big diesels ~~~~~~~