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Original Mercury replacement – Flo-Torq SSR HD hub kit from Mercury Marine/Quicksilver for high-power outboard and sterndrive engines.
It is designed to provide smoother and quieter shifting while protecting the transmission from propeller impact.
Flo-Torq SSR HD propeller hub kit (Soft Shift Rubber, Heavy Duty).
Compatibility: Designed for Mercury and Mariner outboard and sterndrive engines with a 1.25-inch propeller shaft.
Specific applications include models such as:
- 225-250 HP Pro XS with Torque Master II gearcase.
- 300 and 350 HP Verado with 5.44-inch HD gearcase.
- Verado 400R (excludes all Verado V10 models).
• Uses a rubber insert bonded inside a solid steel hub to cushion the propeller during gear shifts, reducing "clunk" noise and vibration. Industry experts note that the SSR system significantly reduces shift noise and vibration at the transom, greatly improving operational smoothness compared to traditional hub systems.
• Provides protection to the drive line against minor impacts.
• Rated for engines up to 450 HP.
• Kit contents: Includes propeller nut, propeller hub assembly, bushing kit, and a three-piece washer kit.
• Replaces: 8M0101603.
• Durability: The solid stainless steel design is considered "ultra-durable" and resistant to corrosion and impact, even in saltwater marine environments.






