The Kivivaka Lawn Mower Idler Spring 604490, designed with precision in mind, is a must-have tool for SDX models owners. This spring replacement part offers a reliable solution for keeping your mower idling smoothly, ensuring a hassle-free mowing experience with every start. The kit includes the 604490 spring and a workshop pump belt 607400, which is compatible with the 604490 spring, providing a seamless and efficient installation. When combined, these components significantly reduce the risk of idler spring failure, extending the lifespan of your mower and minimizing downtime. Invest in the Kivivaka Lawn Mower Idler Spring 604490, and enjoy a reliable and cost-effective lawn care solution for your SDX models.