Whale Tail Hydrofoil Stabilizer – Fits Yamaha, Mercury, Johnson, Evinrude, Honda, Suzuki, Tohatsu 8-40 HP (Replaces FO2002)
Whale Tail Hydrofoil Stabilizer – Fits Yamaha, Mercury, Johnson, Evinrude, Honda, Suzuki, Tohatsu 8-40 HP (Replaces FO2002) 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
Whale Tail Hydrofoil Stabilizer – Fits Yamaha, Mercury, Johnson, Ev...
Product Details
This Whale Tail Hydrofoil Stabilizer is engineered to boost performance for outboard motors ranging from 8 to 40 HP, including major brands like Yamaha, Mercury, Johnson, Evinrude, Honda, Suzuki, and Tohatsu for both 2-stroke and 4-stroke engines. It is also compatible with most outboards larger than 40 HP, with the exception of Mercury 4-stroke 40, 50, and 60 HP models.
It serves as a direct replacement for interchange references SeaSierra FO2002, UanofCn FO2002, and NorthBoat FO2002.
- Constructed from high-impact, marine-grade Nylon PA66 plastic for durability.
- Requires drilling for a secure, bolted connection directly to the anti-ventilation plate.
- Includes all necessary stainless steel mounting hardware and a drill bit for installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| SeaSierra | FO2002 |
| UanofCn | FO2002 |
| NorthBoat | FO2002 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Notes |
|---|---|---|---|---|
| Yamaha | Outboards | 8–40 | 2-Stroke & 4-Stroke | |
| Mercury | Outboards | 8–40 | 2-Stroke & 4-Stroke | Except 40, 50, 60 HP 4-stroke models |
| Johnson | Outboards | 8–40 | 2-Stroke & 4-Stroke | |
| Evinrude | Outboards | 8–40 | 2-Stroke & 4-Stroke | |
| Honda | Outboards | 8–40 | 2-Stroke & 4-Stroke | |
| Suzuki | Outboards | 8–40 | 2-Stroke & 4-Stroke | |
| Tohatsu | Outboards | 8–40 | 2-Stroke & 4-Stroke |
*Note: Will also fit most outboards larger than 40 HP except Mercury 4-Stroke 40, 50, 60 HP models. Some smaller outboards down to 4 HP may also be compatible.
Technical Specs
- Product Type
- Hydrofoil Stabilizer / Whale Tail
- Installation
- Outboard/Sterndrive mount (requires drilling)
- Fuel Type
- Gasoline
- Connection
- Bolted to anti-ventilation plate
- Housing Material
- Marine Grade Nylon PA66 Plastic
- Housing Color
- Available in Blue, Red, Black, Silver
- Dimensions
- 13.39" × 13.7" (340mm × 348mm)
- Weight
- 1.4 kg (3.1 lb)
- Fitting Type
- Direct bolt-on
- Other Technical Attributes
- Includes stainless steel mounting hardware and drill bit
What’s in the Box
- 1 x Hydrofoil Stabilizer
- 4 x Sets of Stainless Steel Screws and Nuts
- 1 x 6.5mm Drill Bit
- 1 x Installation Instruction Manual
Installation Notes
- Ensure the engine is off and the boat is stable and secure before beginning.
- Center the hydrofoil on the anti-ventilation (cavitation) plate of your outboard motor.
- Use a marker to precisely mark the four hole locations through the mounting points on the hydrofoil.
- Remove the hydrofoil and carefully drill the marked holes using the included 6.5mm drill bit.
- Position the hydrofoil back onto the plate, aligning it with the newly drilled holes.
- Insert the stainless steel screws, washers, and nuts provided, and tighten them securely. Do not overtighten.
- After the first use, re-check all mounting hardware to ensure it remains tight.
Troubleshooting & FAQ
Will this fit my specific outboard model?
This hydrofoil has a universal design that fits most outboard brands from 8 to 40 HP. It also fits many larger engines, but it is not compatible with Mercury 40, 50, and 60 HP 4-stroke models. Please verify the dimensions and check your anti-ventilation plate to ensure a proper fit.
Is drilling required for installation?
Yes, installation requires drilling four holes into the anti-ventilation plate of your outboard motor. The kit includes the necessary drill bit and stainless steel hardware for a secure, permanent mount.
How does a hydrofoil improve boat performance?
A hydrofoil adds lift to the stern of the boat, helping it get on plane at lower speeds. This reduces bow rise, minimizes porpoising and cavitation, and can lead to improved stability and fuel efficiency.
What material is this hydrofoil made of?
It is manufactured from high-strength, marine-grade Nylon PA66 plastic, which is designed to withstand harsh saltwater and freshwater conditions without corroding or degrading.
What are the signs that a hydrofoil needs to be replaced?
Periodically inspect the hydrofoil for any signs of stress cracks, warping, or significant damage from impacts with underwater objects. If you notice a decline in performance benefits or if the unit is visibly compromised, it should be replaced.
What tools do I need for installation?
You will need a power drill, wrenches to tighten the nuts and bolts, and a marker to position the drill holes. The kit conveniently includes a 6.5mm drill bit and all mounting hardware.
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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