All JD Roosa pumps,C, B, and JDB&JDC originally came with shims behind the leaf spring to limit the max fuel setting. There are also 4 leaf spring sizes, each one allows more shoe travel. Parts can be changed to get more fuel in all pumps, but must be torn down to access the leaf spring to see what is in place now. The shims kept the fuel from being turned up externally, most are removed at rebuild time. The C pump can get what you need with the right parts.
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Today's Featured Article - Fire in the Field A hay fire is no laughing matter-well, maybe one was! And a good life-lesson, too. Following World War II many farm boys returned home both older and wiser. One such man was my employer the summer I was sixteen. He was a farmer by birth and a farmer by choice, and like many returning soldiers, he was our silent hero: without medals or decorations, but with a certain ability to survive. It was on his farm that I learned to use the combination hand clutch and brake on a John D
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