This original Briggs & Stratton engine crankcase provides factory quality and is the lower base of the engine housing that closes the block, forms the engine oil reservoir and provides a precise mounting point for the crankshaft output (PTO end). Made of robust aluminium alloy to the highest OEM standards, this crankcase guarantees perfect geometry, reduces structural vibration and offers excellent heat dissipation from the internal engine elements. By choosing the original part you ensure exact factory dimensions and prevent micro-cracks and oil leakage at the joints, which is a common problem with lower-quality replacement housings. When replacing the crankcase, the contact surfaces on the engine block must be thoroughly cleaned of traces of the old sealant or gasket before assembly. Be sure to use a new original crankcase gasket and replace the crankshaft oil seal so that the system is completely leak-proof. Tighten all crankcase mounting bolts in a cross pattern and gradually, using a torque wrench according to factory specifications, so that the aluminium housing does not warp, oil does not leak and the threads in the engine block are not damaged. Key characteristics: Part type/size: Crankcase cover / lower housing for vertical crankshaft (Sump-Engine) Manufacturer: Briggs & Stratton – original part Reference OEM number: 590569 Previous catalogue number (replaces): 798264 Compatible models: Machines with Briggs & Stratton vertical engines: Suitable for selected 09, 10 and 08P series vertical OHV engines (models on push and self-propelled mowers) Compatible with mowers of the Toro, Craftsman, Husqvarna, Murray and MTD brands that use the stated Briggs & Stratton engines