I fought that flood over problem for years on my 4020 JD gass model. The fuel lines are a bit rusty internally and the carb has a steel needle/ brass seat. The slightst bit of dirt or rust will hold the needle off it's seat and flood the entire engine.
It's a real pain to turn the tank valve on / off every time I use the tractor.
I finally installed a 12V solenoid valve inline before the carb that opens/ closes with the ignition. That totally ended the problem, even if the needle valve leaks, the fuel supply is automatically cut off when I turn off the ignition.
The valve was avalible from my local propane supplier, as the valve is a gasoline fuel lock for a dual fuel propane / gasoline fuel system.
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Today's Featured Article - Adding an Hour Meter - by Steven Gussey. This article tells how I added an electric hour meter to my 1942 Farmall H after rebuilding it. I wanted to keep an accurate maintenance schedule for my rebuilt engine and the implements I use with my tractor, but the H was never available with a tach
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