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  1. Allis Chalmers, Simplicity Tractor Forum
    Hello All, I'm new to this site and have a question about an Agco Allis 1720. My tractor is running rich, I've reset the valves to .004 cleaned the two jets in the carb, replaced the file lines and replaced the plugs with no fix. When the engine is at an idle through half throttle it runs great...
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