The Briggs & Stratton 795387 is a genuine OEM oil seal (also known as a PTO side seal) designed for the crankshaft. This critical component prevents oil from leaking out of the crankcase while the engine is running, ensuring proper lubrication and preventing premature engine wear. Genuine OEM Option The Briggs & Stratton 795387 Oil Seal is the factory-original part. It is made from a durable combination of metal and nitrile rubber to withstand high heat and pressure. Using the OEM part is vital for maintaining EPA emission compliance and ensuring a perfect, leak-free fit without modifications.