Magneto Rotor Fits IH Fits FARMALL Tractor J4One New Aftermarket Replacement Magneto Rotor for International Harvester (IH) Farmall Tractors This aftermarket magneto rotor is a direct replacement for the International Harvester (IH) J4 magneto ignition system. It fits the Farmall Cub and Cub Lo Boy tractors and is a key component of the magneto's ignition timing function. Note: Will NOT fit 154, 184, or 185 models. Verify your tractor is equipped with the J4 magneto before ordering. Compatible
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