The Massey Ferguson 1635484M1 ignition rotor is a genuine OEM component designed for reliable performance in Massey Ferguson tractors. This critical part of the distributor system ensures proper spark distribution to the engine's cylinders, maintaining optimal engine timing and efficiency. With a diameter of 30mm and a height of 20mm, this ignition rotor is compatible with a wide range of Massey Ferguson models, including the 35, 135, 165, 240, 265, 575, 690, and many others, serving as a direct replacement for original part number 894562M1.