Quicksilver 17645 Reservoir to Adaptor O-Ring for Trim Pump

The Quicksilver 17645 (also known as Mercury 25-17645) is a genuine OEM O-ring designed to seal the reservoir to adaptor interface on Mercury and MerCruiser trim pump assemblies. This critical seal prevents hydraulic fluid leakage between the pump housing and reservoir where the two components join together.

Key Features:

• Genuine Mercury Marine/Quicksilver OEM replacement part
• Seals the connection between trim pump reservoir and adaptor
• Prevents hydraulic fluid leaks at pump-to-reservoir interface
• Compatible with Alpha and Bravo sterndrive trim systems
• Durable construction designed for marine hydraulic applications

This O-ring is commonly replaced during trim pump maintenance or when addressing leaks at the four-screw connection point between the pump and reservoir. Replacement typically takes about an hour and requires disconnecting hydraulic lines and separating the pump from the reservoir assembly. Always use genuine Mercury parts to ensure proper fit and reliable sealing performance.