I have the same pumper in a 1.20. Great engines unless something goes wrong with the pump itself, the pump is the old style and no parts are made for it any longer. Once you know how to set one up they are easy to operate and the big plus is you can install your fuel tank anyplace in the plane, even dead center over the CG. Don't worry about sucking down a fuel tank, that's just silly!!! If you have a plugged vent line the engine just quits running. You can draw more pressure with your mouth, set up a fuel tank, plug it and try to draw the tank down by sucking with your mouth. Don't you think the little thin fuel line will close up first?? Just some more on line BS!!