From the parts diagram, it apperars that the two bolts are a plug, and a filter drain. The filter like plug keeps fuel from building up in the air intake. The other allows draining the carb. Go to caseih.com, then choose your country, then search for parts, then begin your search here, then type in 404 in the model box. then choose fuel system, then carb, then Marvel. The needle and seat (controlled by the float are leaking fuel even though the float is working. The needle and seat are either worn out, or there is a piece of rust, or flake of foreign material in the hole where the needle seats. If the needle is smooth on its tapered part, and has no wear groove, it is pronably crud in the hole where it seats. A new needle and seat may be needed. Always shut off the fuel at the tank when the tractor is shut off. Gravity fuel systems are like having a fuel pump run all the time. These things can flood and leak out all your gasoline. It also can fill your engine with fuel (not a good thing). JimN
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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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