Fits Two-Speed Rear Tine Tillers：The 1492099 tiller clutch spring is suitable for Troy-Bilt two-speed rear tine tillers, including suitable for Pony (two-speed), Horse, Econo-Horse, Bronco, Tuffy 3.75 HP, Garden Cultivator TB225, PonyTB21A662G766 , TH1002, 9245, 9621, 0400101, and more older models tiller parts. Replaces riding lawn mower gear shift spring part numbers 1492099, GW-1492099, and GW-1492 Serial Number Compatibility：Suitable for Pony and Horse models with serial numbers from 1001 to 639999. Also compatible with Econo-Horse models starting from serial number 00101 and up (00101-UP) Clutch Engagement Function：This spring connects to the clutch system, providing the necessary tension between the engine and tine drive to keep proper operation Durable Steel and Dimensions：Made from strong spring steel and finished with anti-rust coating. Measures 0.436 inches in diameter and 3.25 inches in length Installation：Use pliers or a flat-head screwdriver to remove the old spring from the clutch assembly. Align and hook the new spring into the clutch bracket holes. Please confirm the dimensions, hook shape at both ends, and mounting position of the new spring match your original spring The Cutetool 1492099 tiller clutch spring is compatible with Troy-Bilt two-speed rear tine tillers, including suitable for Pony (two-speed), Horse, Econo-Horse, Bronco, Tuffy 3.75 HP, Garden Cultivator TB225, and older models like suitable for PonyTB21A662G766, TH1002, 9245, 9621, 0400101. This durable spring keeps proper clutch engagement and smooth operation. Made from strong spring steel with a rust-resistant coating, it measures 0.436 inches in diameter and 3.25 inches in length.Replaces part numbers 1492099, GW-1492099, and GW-1492.