Flo-Torq SSR HD Hub Kit – Fits Mercury 225-400HP Outboards (8M0101601)
Flo-Torq SSR HD Hub Kit – Fits Mercury 225-400HP Outboards (8M0101601) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Flo-Torq SSR HD Hub Kit – Fits Mercury 225-400HP Outboards (8M0101601)
Product Details
The Flo-Torq SSR HD Hub Kit – Fits Mercury 225-400HP Outboards (8M0101601) is designed for Mercury Marine outboards with a 1.25" propeller shaft. This includes 225-250HP Pro XS models with a Torque Master II gearcase, 300-350HP Verado models with a 5.44" HD gearcase, and Verado 400R outboards. It is the first propeller hub system engineered to provide significant shift absorption without requiring additional hardware.
This kit serves as a direct replacement for Mercury part numbers 8M0101601 and 8M0101603.
- Reduces shift noise and vibration by up to 25% for smoother operation.
- Installation is a direct bolt-on process with all necessary hardware included.
- Engineered for use with outboard propeller shafts in marine environments.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Mercury | 8M0101601 | Primary Part Number |
| Mercury | 8M0101603 | Equivalent Part |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This hub kit is specifically designed for select high-horsepower Mercury and Verado outboard engines.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury | Pro XS with Torque Master II gearcase | 225-250 | 4-Stroke | 8M0101601 | |
| Mercury | Verado with 5.44" HD gearcase | 300-350 | 4-Stroke | 8M0101601 | |
| Mercury | Verado 400R | 400 | 4-Stroke | 8M0101601 | |
| Mercury | V8 4-Strokes | 4-Stroke | 8M0101601 | ||
| Mercury | Verado Outboards | 350-450 | 4-Stroke | 8M0101601 |
Technical Specs
- Product Type
- Propeller Hub Kit
- Installation
- Direct bolt-on with included hardware
- Connection
- 1.25" propeller shaft
- Housing Material
- Stainless Steel with rubber components
- Housing Color
- Silver/metallic
- Dimensions
- Height: 9.5 in, Width: 9.5 in, Length: 13.0 in
- Weight
- 2 lb (0.91 kg)
- Fitting Type
- Outboard propeller shaft
- Vibration Reduction
- Reduces shift noise and vibration by 25%
What’s in the Box
- 1 x Complete SSR HD Hub Kit (8M0101601), including:
- 1 x Prop Nut
- 1 x Propeller Hub Assembly Bushing Kit
- 1 x Three-piece Washer Kit
Installation Notes
- Ensure the engine is off and the propeller is in a safe, stationary position before starting.
- Remove the existing propeller, cotter pin, nut, and any washers or hub components from the propeller shaft.
- Clean the propeller shaft, inspecting for any damage or excessive wear.
- Slide the new Flo-Torq SSR HD hub assembly onto the propeller shaft according to the manufacturer's diagram.
- Install the forward thrust washer, followed by the new propeller.
- Place the aft washer onto the shaft and tighten the propeller nut to the torque specified in your engine's service manual.
- Align the nut retainer with the cotter pin hole and secure it with a new cotter pin.
Troubleshooting & FAQ
How do I know if this hub kit fits my specific engine model?
This kit is designed for Mercury outboards using a 1.25" diameter propeller shaft, including the 225-400HP models listed in the compatibility table. Please verify your engine details and the OEM part number 8M0101601 before ordering.
What is the main benefit of the SSR technology?
The Soft-Shift Rubber (SSR) technology significantly reduces noise and vibration during shifting (clunk) by about 25%. It achieves this without needing special or additional hardware, providing a quieter and smoother boating experience.
Is this hub kit difficult to install?
Installation is a direct bolt-on process. If you are familiar with changing a propeller, you should find the process straightforward. However, we always recommend professional installation to ensure correct fitment and safety.
What are the signs that my old hub kit is failing?
Common signs of a failing hub include excessive propeller slippage (engine RPMs increase without a corresponding increase in speed), unusual vibrations, or loud, harsh noises when shifting into gear.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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