That series of Kohler was basically a good engine, so I would take a serious look at rebuilding, depending on what parts you will need and their cost. This manual will help you decide if you think you can do the work yourself. I would price out the parts you figure you need and add $100, in case you forget something. Might mean a tear down before deciding. http://resources.kohler.com/power/k...45.1658754340.1601335970-986432130.1601335970