Best Hub Kit for Propellers: Top Flo-Torq II and Replacement Kits for Marine Propulsion
Need a reliable hub kit to protect your propeller and drivetrain? This guide highlights five top hub kits that fit Mercury, Mercruiser, and MerCruiser engines, including Flo-Torq II and SSR variants. These kits suit boaters performing regular maintenance, boat owners upgrading OEM parts, and anyone seeking easier field service. Each option is selected for compatibility across a range of HP, spline counts, and propeller sizes, with notes on best use cases and potential limitations.
| Product | Main Use | |
|---|---|---|
| Quicksilver Flo-Torq II Hub Kit | OEM-style Flo-Torq II replacement | Owners of Mercury/Mariner/MerCruiser engines needing robust protection |
| Qiclear Flo-Torq II Hub Kit | Replacement hub compatible with 15-spline props | Mercruiser Alpha/Bravo drives and Mercury Outboards |
| KSJED Flo-Torq II Hub Kit | OEM-style hub for multiple engines | Mercury/Mariner and MerCruiser sterndrives |
| NOVINO Flo-Torq II Hub Kit | Hub replacement for 13 1/4″ and 14 1/2″ propellers | Mercury/Mariner and MerCruiser Alpha One/Bravo One |
| Quicksilver SSR Hub Kit | SSR upgrade for lighter noise and smoother operation | Mercury 40hp to 225hp FourStroke and similar |
Quicksilver Flo-Torq II Hub Kit
Brand: Quicksilver
- Flo-Torq II is a modular hub system for outboard and sterndrive engines
- Field serviceable design reduces downtime while performing hub replacement
- Hub systems cushion and protect the drivetrain from impacts
Best for: Boat owners with Mercury/Mariner or MerCruiser engines seeking a field-serviceable, OEM-style hub that protects the drivetrain during prop changes. Caution: verify spline compatibility with your specific propeller before purchase.
Qiclear Flo-Torq II Hub Kit
Brand: Qiclear
- OEM upgrade for Mercury/Marina/Mercruiser drives (60-300 HP) with 15-spline propellers
- Modular hub system compatible with Quicksilver and other aftermarket props
- Check engine type and spline count before purchasing
Best for: Do-it-yourselfers replacing hub on Mercury/Mariner/ Mercruiser setups with 60-300 HP motors and 15-spline props. Better for: those seeking OEM-style fit at a potentially lower price. Limitation: ensure compatibility with your exact drive model.
KSJED Flo-Torq II Hub Kit
Brand: KSJED
- OEM numbers: 835257Q1, 835257K1
- Fits Mercury 60-300HP, 15-spline; MerCruiser Alpha/Bravo sterndrives; a wide range of Mercury/Mariner engines
- Includes compatibility with 13 1/4″ x 17″ and 14 1/2″ x 19″ propellers
Best for: Mariners needing a versatile hub kit that covers many Mercury/Mariner and MerCruiser configurations. Limitation: verify exact engine and propeller combination for a correct fit.
NOVINO Flo-Torq II Hub Kit
Brand: NOVINO
- Replaces OEM # 835257Q1 and 835257K1
- Fits 13 1/4″ x 17″ and 14 1/2″ x 19″ propellers for Mercury/Mariner and MerCruiser Alpha One/Bravo One sterndrives
- Not compatible with some Verado or older Mercury models
Best for: Owners needing a direct replacement hub compatible with a broad propeller range and multiple engine configurations. Caution: check model year compatibility and verify fit with your drive model before ordering.
Quicksilver 8M0150152 Flo-Torq SSR Hub Kit
Brand: Quicksilver
- SSR hub kit for Mercury 40hp CT to 225hp FourStroke
- 1″ diameter prop shaft; reduces shifting noise and propeller rattle
- SSR is an upgrade to Flo-Torq II and replaces Flo-Torq III/IV
Best for: Boaters seeking quieter, smoother power delivery with a newer hub standard on a wide horsepower range. Choose this if you want the SSR upgrade path. Limitation: is specific to 1″ prop shafts; confirm your shaft size.
Buying Guide
What should I look for when buying a hub kit?
- Engine compatibility: Verify your engine family (Mercury/Mariner, MerCruiser Alpha/Bravo, Verado) and horsepower range to ensure the hub kit fits.
- Spline count and propeller size: Confirm the spline count (e.g., 15-spline) and propeller diameter to match the hub kit.
- Replacement type: OEM-style Flo-Torq II, or SSR variants, depending on desired performance and noise reduction.
- Field serviceability: If downtime matters, choose modular and field-serviceable designs.
- Material considerations: Brass or other corrosion-resistant materials improve longevity in saltwater.
Frequently Asked Questions
- What is Flo-Torq II used for?
Flo-Torq II is a modular hub system designed to cushion the drivetrain and protect propeller connections on outboard and sterndrive engines.
- How do I know which hub kit fits my boat?
Check your engine model, horsepower rating, and propeller spline count; verify OEM numbers when possible.
- What is the advantage of SSR over Flo-Torq II?
SSR aims to reduce shifting noise and provide smoother power delivery, often as an upgrade path beyond Flo-Torq II.
- Are these hub kits suitable for saltwater use?
Most kits use corrosion-resistant materials, but always verify material and maintenance requirements for saltwater environments.
- Can I replace just the hub or do I need a full kit?
Replacement parts are available as hub kits; ensure you replace with the exact OEM or compatible hub for your drive type.