Troy Bilt Tiller Clutch Control Spring part# GW-1492 superseeds to part# GW-1492099. This compression style spring provides tension to the clutch roller on the forward/reverse lever of the tiller. This spring is approximately 3-1/2" long and has a diameter of 1/2" and has hooks for attachment on each of its ends. Commonly used on the large frame tillers like the Horse and Ecno Horse models.