Mercury – Quicksilver 835257Q1 Flo-Torq II Hub Kit | Mercury, Mariner & MerCruiser Engines | 835257Q1

Overview

The Quicksilver 835257Q1 Flo-Torq II Hub Kit brings smooth performance and proven protection to your Mercury, Mariner, Force, and MerCruiser setups. It’s designed for Mercury/Mariner 40–60HP Command Thrust, 70–250HP outboards, Force 90–120HP, and Verado 150–300HP (6-cylinder, 1-inch shaft only) — as well as MerCruiser Alpha, Alpha One, and Bravo One sterndrives under 400HP.

This modular hub system cushions your drivetrain from prop strikes and vibration while maintaining efficient power transfer. It’s field-serviceable too, meaning you can replace components yourself and get back on the water without downtime or a trip to the shop.

Key Features

• Purpose: Protects your outboard or sterndrive drivetrain from impact while improving propeller performance.
• Material: Built from high-strength Delrin and corrosion-resistant stainless components for maximum durability in all marine conditions.
• Performance: Reduces vibration and noise while cushioning your gears against sudden impact loads.
• Design: Mercury’s original Flo-Torq II modular system, compatible with a wide range of Mercury, Mariner, Force, and MerCruiser engines.
• Ease of Use / Install: Fully field-serviceable and easy to install — no waiting for a rubber hub replacement or professional service.

Engine & Boat Compatibility

• Mercury & Mariner: 40–60HP Command Thrust and 70–250HP outboards
• Force: 90–120HP outboards
• Verado: 150–300HP 6-cylinder models (1-inch shaft only; not compatible with Verado V8 1.25-inch shafts)
• MerCruiser: Alpha, Alpha One, and Bravo One sterndrives (under 400HP)
• Ideal for a wide range of boats, from fishing rigs and pontoons to high-performance sterndrive setups

Performance & Real-World Benefits

The 835257Q1 Flo-Torq II Hub Kit helps keep your prop shaft and gearcase safe when you hit underwater debris or experience sudden prop load changes. It acts like a shock absorber between your prop and drivetrain — taking the hit so your lower unit doesn’t.

You’ll also notice smoother acceleration, reduced vibration, and quieter running. And since the hub is field-serviceable, you can replace worn parts yourself in just a few minutes and get back on the water.

Why Choose OEM

Mercury’s Flo-Torq system is the industry standard for propeller hub technology. Aftermarket copies often lack the precise tolerances needed for smooth torque transfer, which can lead to noise, vibration, or gear wear.

A genuine Quicksilver Flo-Torq II Hub Kit ensures factory-level fit, dependable performance, and long-term protection — the same system Mercury installs on new engines and sterndrives.

FAQ

Q1: What engines fit the Quicksilver 835257Q1 hub kit?
A: It fits Mercury/Mariner 40–60HP Command Thrust, 70–250HP, Force 90–120HP, and Verado 150–300HP (1" shaft only), plus MerCruiser Alpha & Bravo One sterndrives under 400HP.

Q2: What’s included in the kit?
A: One Flo-Torq II hub sleeve, splined adapter, washers, and prop nut.

Q3: What makes Flo-Torq II different?
A: It’s a modular hub system that absorbs shock and is easy to service without shop help.

Q4: Can I install it myself?
A: Yes. It installs easily using basic hand tools and standard prop hardware.

Q5: Why OEM instead of aftermarket?
A: OEM kits guarantee perfect fit, proper torque transfer, and the same reliability Mercury builds into every drive.