The use of copper in fuel systems is poor practice. For gasoline, copper can be picked up from the fuel line or other copper bearing material. Metal deactivators are added to prevent the trace amount of copper from acting as a catalyst in the formation of various undesirables. From my prior life I am aware of an instant where copper was used in a jet fuel system application. During hot fuel testing copper was obsorbed from the tubing and plated out on internal fuel metering componets resulting in performance problems.
Yes many people use copper and no problems result. However it should be avoided as there are better materials in terms of strenght and compatiblity with fuel.
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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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