Spider Plate and Wobble Pump
Next step is to rivet the doublers in place.
Here's where they go.
Lastly - my friend and fellow Bucker Jungmann owner John LaBarre sent me this D-11 wobble pump. Since the Hisso carburetor is higher than the bottom of the fuel tank, the engine will not gravity feed. Originally, they solved this problem by -
1.) pressurizing the fuel tank with an air pump.
2.) install a header tank in the center section fed by a mechanical (or wind driven) fuel pump.
I really don't like either of these options. The thought of a fuel tank under pressure, ready to burst, does not thrill me. I think the header tank looks awful.
So, I'm going to put an engine driven fuel pump on the back of the Hisso, and use this wobble pump as a backup. I think the Old Rhinebeck Jenny uses this method.
This pump is in great shape, but in all likely hood, it should be overhauled. Does anyone know a place that overhauls D-11 pumps? They seem like simple creatures. Anyone take one apart themselves and do the same thing?
A hearty thanks to John LaBarre for the pump.