The MTD 951-14028A Carburetor Assembly Primer Hydraulic helps deliver the proper fuel and air mixture for reliable engine operation. This carburetor assembly meters fuel, combines it with incoming air, and supplies the mixture to the engine for combustion. Its primer mechanism assists in preparing the fuel system for starting by helping introduce fuel into the carburetor. Proper operation supports easier starting, steady idling, and consistent engine performance. Replacing a worn or damaged assembly can help restore fuel delivery and maintain dependable operation. This replacement component is a practical choice for servicing compatible outdoor power equipment during routine maintenance.