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 - New Hitches For Your Old Tractor - by Chris Pratt. For this article, we are going to make the irrational and unlikely assumption that you purchased an older tractor that is in tip top shape and needs no immediate repairs other than an oil change and a good bath. To the newcomer planning to restore the machine, this means you have everything you need for the moment (something to sit in the shop and just look at for awhile while you read the books). To the newcomer that wants to get out and use the machine for field work, you may have already hit a major roadblock. That is the dreaded "proprietary hitch". With the exception of the
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