The Briggs & Stratton 291675S is a genuine OEM oil seal (also referred to as a crankcase or PTO side seal). This critical component is designed to provide a tight, leak-proof seal around the engine’s crankshaft, preventing oil from escaping the crankcase while keeping dirt and debris out. Genuine OEM Part The Briggs & Stratton 291675S Oil Seal is the factory-original replacement. It is manufactured to exact OEM standards using durable rubber and metal reinforcement to withstand high temperatures and constant friction. Using a genuine seal is highly recommended for this repair, as aftermarket versions are often cited by users…