Kisankraft Recoil Spring (O) is a genuine replacement spring designed for 2-stroke brush cutters, compatible with KK-BC-555, 7640, and 8640 models. This recoil spring is a key component of the recoil starter assembly, providing the necessary tension to rewind the starter rope after each pull. Durable and precisely engineered, it ensures reliable engine starting and is ideal for maintenance or replacement in demanding agricultural and landscaping environments.