Whale Tail Hydrofoil Stabilizer – Fits Outboard Motors & Stern Drives 40-300 HP (Replaces FO2003)
Whale Tail Hydrofoil Stabilizer – Fits Outboard Motors & Stern Drives 40-300 HP (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.
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Whale Tail Hydrofoil Stabilizer – Fits Outboard Motors & Stern ...
Whale Tail Hydrofoil Stabilizer – Fits Outboard Motors & Stern Drives 40-300 HP (Replaces FO2003) is backordered and will ship as soon as it is back in stock.
Product Details
This marine-grade reinforced PA66 nylon Whale Tail Hydrofoil Stabilizer is designed for 40-300 HP outboard motors and stern drives. It improves boat handling, reduces porpoising, decreases planning time, and enhances fuel efficiency for a smoother, more controlled ride.
This unit serves as a direct interchange for NorthBoat FO2003, QuickMarine Whale Tail Hydrofoil, SupremeMarine FO2003, and UanofCn FO2003 models.
- Installation requires drilling and bolting to the anti-cavitation plate (4-bolt hardware included).
- Made from premium, marine-grade PA66 reinforced nylon for exceptional durability and corrosion resistance.
- Features a unique curved "Turbo Trac" shape to reduce drag and eliminate cavitation around the propeller.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number |
|---|---|
| NorthBoat | FO2003 |
| QuickMarine | Whale Tail Hydrofoil |
| SupremeMarine | FO2003 |
| UanofCn | FO2003 |
Engine & Model Compatibility
Confirm your engine model and horsepower in the table below. Note the specific exceptions listed for certain models.
| Brand | Compatibility | Notes |
|---|---|---|
| General | 40-300 HP Outboard Motors & Stern Drives | Not recommended for Mercury 4-Stroke 40/50/60 HP |
| Volvo | SX-A, DPS, DPR, DPH series, 280 and 290 series | Requires longer bolts and 1" fender washers; Not recommended for Volvo Ocean Series XDP |
| Mercury | Most 40-300 HP models | Except Mercury 4-Stroke 40, 50, 60 HP; Not for Mercury Bravo II |
| Honda | Most 40-200 HP models | Not for 200+ HP models |
| Yamaha | Most 40-300 HP models | Not for 350 HP models |
Technical Specs
- Product Type
- Hydrofoil Stabilizer
- Installation
- 4-bolt (drill required)
- Fuel Type
- Gasoline
- Connection
- Anti-cavitation plate mount
- Housing Material
- Premium Nylon-PA66 Marine Grade Plastic
- Housing Color
- Blue, Silver, or Red (depending on model)
- Dimensions
- 17" × 14.4" (432mm × 366mm)
- Weight
- 1.72 kg (3.79 lbs)
- Fitting Type
- Drill and bolt
- Warranty
- 30-day returns (Amazon/Walmart)
- Other Technical Attributes
- Features curved "Turbo Trac" shape to reduce drag and eliminate cavitation
What’s in the Box
- 1 × Hydrofoil Stabilizer
- 4 × Sets of Stainless Steel Screws and Nuts
- 1 × 6.5mm Drill Bit
- 1 × Installation Instructions
Installation Notes
- For safety, disconnect the engine's battery before starting installation.
- Center the hydrofoil on the anti-cavitation plate of your motor. Position it as far back as possible without interfering with propeller movement.
- Use the hydrofoil’s mounting holes as a template to mark the four drill points on the plate.
- Remove the hydrofoil and carefully drill the four marked holes using the included 6.5mm drill bit.
- Place the hydrofoil onto the plate, aligning it with the newly drilled holes.
- Insert the stainless steel bolts from the top down, securing them with the washers and nuts from underneath.
- Tighten all bolts securely and evenly. Do not overtighten, as this could damage the plate.
- Reconnect the battery and test your boat's performance in a safe, open-water area.
Troubleshooting & FAQ
Will this hydrofoil fit my specific engine model?
This stabilizer is designed for most 40–300 HP outboard motors and stern drives. However, please review the compatibility exceptions in the table above, such as for Mercury 4-Stroke 40/50/60 HP models and certain Volvo Penta drives. Always compare the specs to your engine's requirements.
Do I have to drill holes in my engine's cavitation plate?
Yes, this hydrofoil requires a 4-bolt installation, which involves drilling into the anti-cavitation plate. This method ensures a secure and stable fit for optimal, reliable performance.
How does this hydrofoil improve performance?
Its wings provide hydrodynamic lift to the stern, which helps the boat get on plane faster, stay on plane at lower speeds, and reduces porpoising (bow bouncing). The curved "Turbo Trac" design minimizes drag and cavitation for greater efficiency.
Will this reduce my boat's top speed?
While some hydrofoils can slightly decrease top-end speed by a few MPH due to added drag, many users find the trade-off is worth the significant improvements in handling, stability, and fuel economy at cruising speeds.
What is the difference between this PA66 nylon model and others?
PA66 is a high-strength, reinforced engineering-grade nylon that offers an excellent balance of stiffness and impact resistance, making it more durable than standard plastics and less prone to corrosion or cracking than many metal alternatives.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility, where it is batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit is 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.
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