691766 – Briggs & Stratton Sealing Washer (Genuine OEM Part) The Briggs & Stratton 691766 Sealing Washer is a genuine OEM sealing fastener component designed to prevent fluid leaks at threaded connections within Briggs & Stratton small engine systems. This precision-engineered washer creates a tight seal between the bolt or screw head and the engine surface, helping maintain proper oil containment and system integrity. Manufactured to Briggs & Stratton’s strict OEM specifications, the 691766 sealing washer provides exact fitment, reliable sealing performance, and resistance to oil, heat, and vibration. Using a genuine Briggs & Stratton sealing washer ensures proper assembly and long-term durability in demanding lawn and garden equipment applications. Key Details: Manufacturer: Briggs & Stratton Part Number: 691766 Part Type: Sealing Washer Function: Prevents oil or fluid leakage at fastener connections Material: Metal washer with integrated sealing surface Application: Small engine oil system and component assemblies Installation: Direct OEM replacement Compatibility: The Briggs & Stratton 691766 Sealing Washer is used on select Briggs & Stratton engines commonly installed in: Walk-behind lawn mowers Riding lawn mowers Lawn tractors Pressure washers Residential and light commercial outdoor power equipment Typically compatible with various Briggs & Stratton engine series used in lawn and garden applications. The genuine Briggs & Stratton 691766 sealing washer ensures proper sealing, protects against fluid leaks, and supports reliable long-term engine performance in Briggs & Stratton-powered equipment.