Rupp Top Gun Backing Plate w/2.4" Hole - Sold Individually, 2 Required

The Rupp Top Gun Backing Plate with 2.4" hole is a critical structural component designed for marine propeller systems and high-performance watercraft installations. Engineered for operators who demand reliability under extreme conditions, this backing plate serves as the foundation for secure hub assembly and load distribution. Whether you're outfitting a center console, offshore performance vessel, or commercial fishing platform, this component ensures proper thrust transmission and vibration isolation between the propeller hub and shaft assembly.

Manufactured by Rupp Marine, a leader in marine propulsion hardware, this backing plate features precision engineering that handles the cyclic stress and torsional forces inherent in high-speed water operations. The 2.4" center hole accommodates standard propeller shaft diameters while the flat profile distributes clamping pressure evenly across the hub interface, reducing stress concentration and preventing hub creep or misalignment. Constructed from marine-grade materials resistant to saltwater corrosion and cavitation erosion, the plate maintains dimensional stability across temperature variations and extended deployment cycles. The individual unit weighs 0.65 lbs and measures 6" x 1" x 9", making it a compact yet robust solution for demanding marine environments.

Installation requires two backing plates per propeller hub assembly, as noted in the product specification—one per side of the hub to create a symmetrical load-bearing interface. This configuration is standard across high-performance and commercial marine applications where dual backing plates ensure balanced thrust delivery and eliminate lateral load imbalance that could induce vibration or premature bearing wear. Technicians and marine mechanics installing Rupp propulsion systems will recognize this plate as OEM-specification hardware essential for correct assembly torque application and long-term system reliability.