Whale Tail Hydrofoil Stabilizer – Fits Outboard & Sterndrive 40-300 HP Engines (Replaces FO2003)
Whale Tail Hydrofoil Stabilizer – Fits Outboard & Sterndrive 40-300 HP Engines (Replaces FO2003) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
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Whale Tail Hydrofoil Stabilizer – Fits Outboard & Sterndrive 40...
Whale Tail Hydrofoil Stabilizer – Fits Outboard & Sterndrive 40-300 HP Engines (Replaces FO2003) is backordered and will ship as soon as it is back in stock.
Product Details
This Whale Tail Hydrofoil Stabilizer is designed for universal application on most outboard and sterndrive engines rated from 40 to 300 HP. It improves planing speed, reduces porpoising and cavitation, and enhances overall fuel efficiency for a better boating experience.
This part is a direct cross-reference for several part numbers, including UANOFCN FO2003, NorthBoat FO2003, SupremeMarine FO2003, and Marine Sport 300.
- Installation requires drilling and mounting directly to the engine's anti-ventilation plate.
- Constructed from premium, marine-grade PA66 nylon for durability in harsh saltwater and freshwater environments.
- Each kit includes all necessary stainless steel mounting hardware and a drill bit for a complete installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| UANOFCN | FO2003 |
| NorthBoat | FO2003 |
| SupremeMarine | FO2003 |
| Marine Sport | 300 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| All Marine Brands | Outboard Motors | 40-300 HP | 2- & 4-Stroke | FO2003 | Universal fit |
| All Marine Brands | Stern Drives | 40-300 HP | 2- & 4-Stroke | FO2003 | Universal fit |
Technical Specs
- Product Type
- Hydrofoil Stabilizer (Whale Tail style)
- Installation
- Direct mount to anti-ventilation plate; requires drilling
- Fuel Type
- Gasoline (compatible with all marine fuel types)
- Connection
- Bolt-through with 4 mounting points
- Housing Material
- Premium Nylon PA66 Marine Grade Plastic
- Housing Color
- Blue, Silver, Red (color variations available)
- Dimensions
- 16.93 × 14.17 inches (430 × 360 mm)
- Weight
- 1.72 kg (3.79 lbs)
- Fitting Type
- Anti-ventilation plate mount
- Hardware
- Stainless steel hardware included
- Warranty
- 90 days (UANOFCN model)
- Other Technical Attributes
- Turbo Trac design for improved steering precision
What’s in the Box
- 1 x Hydrofoil Stabilizer (FO2003)
- 4 x Sets of Stainless Steel Screws and Nuts
- 1 x Installation Instruction
- 1 x Drill bit for installation
Installation Notes
- Position the hydrofoil onto the anti-ventilation plate of your outboard or sterndrive, ensuring it is centered.
- With the hydrofoil held firmly in place, use a marker to accurately mark the four mounting hole locations on the plate.
- Remove the hydrofoil and carefully drill the four holes using the provided drill bit. Ensure the drill is perpendicular to the plate to prevent misalignment.
- Place the hydrofoil back onto the plate, align the holes, and insert the stainless steel bolts from the top.
- Secure the hydrofoil by attaching and tightening the nuts from below. Do not overtighten. Check for a firm, secure fit before operating your vessel.
Troubleshooting & FAQ
Will this hydrofoil fit my specific engine?
This is a universal hydrofoil designed to fit most outboard and sterndrive motors from 40 to 300 HP. For a guaranteed fit, compare your anti-ventilation plate's dimensions to the hydrofoil's size of 16.93 × 14.17 inches to ensure adequate mounting surface.
Do I have to drill into my engine's cavitation plate?
Yes, permanent installation requires drilling four holes into the anti-ventilation (cavitation) plate to securely bolt the hydrofoil. All necessary hardware, including a drill bit, is included.
What performance benefits can I expect?
A properly installed hydrofoil helps your boat get on plane faster, maintains planing at lower speeds, reduces or eliminates porpoising (bow bouncing), and can improve overall fuel economy. The Turbo Trac design also enhances steering control and stability.
Is this an OEM part?
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.
How fast is shipping?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
What is the warranty?
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.
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