That pump is not for priming the fuel system,it is for cold start.On your intake manifold there is a glow plug,looks like a big spark plug.Sometimes guys would remove these and put a big plug in there and do away with this system,and just use ether.You would activate that,then pump the hand primer to around 125psi if I remember correctly.There is a little injector in the manifold next to the glow plug it would atomize the fuel as you pumped the hand pump and it would spray on the glow plug giving you a warm blast of atomized fuel while you were cranking.Not many people understood how to use these,but they actually worked quite well.Had a 335 back in the day,and unless it was really cold,between the this and the compression release,I could usually get it going.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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