Walbro diaphragm and gasket kits are identified by the first letter D (for diaphragm) in the kit part number. These kits only contain the diaphragms and gaskets; unlike the full repair kits (identified by the letter K) which contain everything need for a complete rebuild. The decision of which kit to buy requires proper diagnosis of the condition of your carburetor. In many cases, replacement of the diaphragm and gasket only is sufficient to correct a carburetor problem. Refer to the Walbro reference charts on our site to properly identify your required diaphragm and gasket kit. We also suggest doing a visual check for the model number located on the carburetor body in your equipment for confirmation.