The solenoid controls the LOAD or high speed circuit in the carburetor. Smoking at idle should be cured by backing out the idle mixture screw. On this carburetor counter clockwise is leaner on the IDLE screw. Another possibility is a needle and seat that is intermittently leaking fuel. Another possibility is the idle air bleed or the air supply for the idle air mixture screw being plugged. Still another is a plugged air cleaner. An M Farmall does not need high octane fuel, that is just nonsense.
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Today's Featured Article - Identifying Your Tractor - by Staff. Maybe you bought it from a friend who didn't know what kind of tractor it was, or perhaps (and this is every tractor fanatics dream) you stumbled across it in an abandoned field covered with weeds but intact. In any case, you have no idea what the make and/or model is. For awhile perhaps it doesn't really matter. Especially if it runs! But pretty soon you'll probably need to tinker with it a bit and maybe buy a part or too. Having a manual is nice. But how does one go about dete
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