Kohler engine overhaul kits are available at online from JacksSmallEngines, eBay and Amazon as of March 2015. Kohler engine rebuild kits typically include rings, gaskets, valves and pistons.
JacksSmallEngines advertises rebuild kits for Kohler engines. Available kits include those for K301 standard 12 horsepower horizontal engines, K241 standard 10 HP horizontal engines and K321 standard 14 HP horizontal engines.
Examples of Kohler overhaul kits that have been listed on eBay include kits for Kohler engine models K301, K241, K321 and K181.
Kohler rebuild kits listed on Amazon include the K341 16 HP basic rebuild kit and the K301 12HP standard rebuild kit. Amazon also lists several Kohler carburetor repair kits.