Compatible with Tecumseh part numbers: 640020, 640020A, 640020B. Fits Tecumseh engines: VLV50, VLV55, VLV60, VLV65, VLV66, VLV126, VLV126A. Compatible with MTD chipper model: 24AF561C099 (2002). Also suitable for Walk Behind Toro models: 20060, 20061, 20653.