Mercury – Quicksilver 835257K1 Flo-Torq II Propeller Hub Kit | Mercury 40–300HP Outboards & MerCruiser Sterndrives (Under 400HP) | 835257K1

Overview

Get smooth performance and peace of mind with the Quicksilver 835257K1 Flo-Torq II Propeller Hub Kit. Designed for Mercury 40–60HP Command Thrust and BigFoot outboards, Mercury and Mariner 70–300HP outboards, Force 90–120HP outboards, and MerCruiser Alpha One and Bravo One sterndrives under 400HP, this kit adds a layer of protection between your prop and drivetrain.

The Flo-Torq II system cushions your propeller shaft from shock loads during minor impacts — absorbing the hit so your gears don’t take the damage. It’s easy to install, field-serviceable, and trusted by boaters who want performance without risk.

Key Features

• Purpose: Protects your propeller shaft and lower unit from impact damage while delivering smooth, reliable power transfer.
• Material: Made from high-strength Delrin and corrosion-resistant metal components built for long-term marine use.
• Performance: Cushions drivetrain shock loads, reduces vibration, and maintains full torque transfer at all speeds.
• Design: Flo-Torq II modular system allows quick replacement of the drive sleeve without removing the propeller hub.
• Ease of Use / Install: Kit includes thrust washer, drive sleeve, splined adapter, tab washer, and prop nut — installs easily with basic hand tools.

Engine & Boat Compatibility

• Mercury 40–60HP Command Thrust & BigFoot outboards
• Mercury & Mariner 70–300HP outboards
• Force 90–120HP outboards
• MerCruiser Alpha One & Bravo One sterndrives (under 400HP)
• Common on fishing boats, center consoles, pontoons, and runabouts

Performance & Real-World Benefits

The 835257K1 Flo-Torq II Hub Kit softens the blow of minor impacts, protecting your gearcase from expensive damage. It also helps smooth out performance by reducing prop chatter and vibration.

If you ever hit something in the water, the modular hub sleeve can be replaced right on the dock in minutes — no special tools required. It’s a small investment that pays off big in reliability and peace of mind every time you throttle up.

Why Choose OEM

Mercury’s Flo-Torq system is precision-engineered for their engines and sterndrives, guaranteeing perfect torque transfer and alignment. Cheaper aftermarket hubs may not fit correctly, causing noise, vibration, or premature wear.

A genuine Quicksilver Flo-Torq II Hub Kit ensures quiet operation, smooth acceleration, and the protection your drivetrain deserves — the same system Mercury installs from the factory.

FAQ

Q1: What engines fit the Quicksilver 835257K1 kit?
A: It fits Mercury 40–300HP outboards, Force 90–120HP outboards, and MerCruiser Alpha & Bravo One sterndrives (under 400HP).

Q2: What’s included in the kit?
A: One thrust washer, drive sleeve, splined adapter, tab washer, and prop nut.

Q3: How does it protect my drivetrain?
A: It absorbs shock from prop strikes, helping prevent lower unit or gear damage.

Q4: Can I replace the sleeve myself?
A: Yes. It’s fully field-serviceable and easy to swap using standard tools.

Q5: Why OEM instead of aftermarket?
A: OEM hubs offer exact fit, smoother operation, and longer service life than generic versions.