25-93528 ? Mercury O-RING

Genuine Mercury-Mercruiser O-ring seal part number 25-93528 is an elastomer component used in fuel system, cooling system, and hydraulic connections on Mercury outboards and Mercruiser sterndrives. Provides watertight and fuel-tight sealing at threaded and flanged connections. Made from durable synthetic rubber rated for marine fuel and coolant compatibility. Critical wear item; replace during any service disconnection. Order part-specific O-ring kit to ensure correct durometer and size.