The MTD 753-11138 Short Block Assembly restores engine performance by providing a reliable core replacement for compatible equipment. This short block assembly includes the essential internal engine components preassembled within the block, forming the foundation of the engine’s power system. It works by housing and supporting the crankshaft and piston assembly, enabling proper combus... https://www.wholetoolbox.com/mtd-753-11138-short-block-assembly