Hydrofoil Stabilizer – Fits Outboard & Stern Drives 40-300 HP (Replaces SupremeMarine FO2003, UANOFCN FO2003, JDSNAEY Sport 300 FO2003, NorthBoat FO2003)
Hydrofoil Stabilizer – Fits Outboard & Stern Drives 40-300 HP (Replaces SupremeMarine FO2003, UANOFCN FO2003, JDSNAEY Sport 300 FO2003, NorthBoat 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.
International delivery times may vary due to customs processing.
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Hydrofoil Stabilizer – Fits Outboard & Stern Drives 40-300 HP (...
Hydrofoil Stabilizer – Fits Outboard & Stern Drives 40-300 HP (Replaces SupremeMarine FO2003, UANOFCN FO2003, JDSNAEY Sport 300 FO2003, NorthBoat FO2003) is backordered and will ship as soon as it is back in stock.
Product Details
This universal Marine Whale Tail Hydrofoil Stabilizer is designed to improve boat performance on most outboard and stern drive motors from 40 HP to 300 HP. The whale tail design helps get the boat on plane faster, reduces porpoising and cavitation, and enhances overall stability for a smoother ride.
It serves as a direct aftermarket replacement for several part numbers, including SupremeMarine FO2003, UANOFCN FO2003, and JDSNAEY Sport 300 FO2003, offering a versatile fit for a wide range of engines.
- Installs via a simple bolt-on process to the anti-cavitation plate.
- Constructed from durable, marine-grade reinforced Nylon-PA66 plastic to withstand harsh marine environments.
- The complete kit includes all necessary mounting hardware and a drill bit for straightforward installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| SupremeMarine | FO2003 | Aftermarket |
| UANOFCN | FO2003 | Aftermarket |
| JDSNAEY | Sport 300 FO2003 | Aftermarket |
| NorthBoat | FO2003 | Aftermarket |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| All Brands | Outboard Motors | 40-300 HP | 2- & 4-Stroke | FO2003 | Universal fit |
| All Brands | Stern Drives | 40-300 HP | 2- & 4-Stroke | FO2003 | Universal fit |
| Volvo | SX-A, DPS, DPR, DPH series | Confirmed compatible |
Technical Specs
- Product Type
- Hydrofoil Stabilizer (Whale Tail Style)
- Installation
- Bolt-on to anti-cavitation plate
- Housing Material
- Marine Grade Reinforced Nylon-PA66 Plastic
- Housing Color
- Blue
- Dimensions
- 16.93 × 14.17 inches (430 × 360 mm)
- Weight
- 1.54 kg (3.4 lbs)
- Fitting Type
- Bolt-on
- Other Attributes
- Streamlined design to reduce drag; Control tips to improve thrust
- Warranty
- 1-Year
What’s in the Box
- 1 x Hydrofoil Stabilizer (FO2003)
- 4 x Sets of Screws and Nuts
- 1 x Installation Instruction
- 1 x Drill bit (for installation)
Installation Notes
- For safety, disconnect the boat's battery before beginning installation.
- Position the hydrofoil onto the engine's anti-cavitation plate, ensuring it is perfectly centered.
- Use a marker to indicate the drilling locations through the mounting holes of the hydrofoil.
- Carefully remove the hydrofoil and drill the marked holes using the included drill bit.
- Reposition the hydrofoil, aligning it with the newly drilled holes.
- Insert the bolts from the top and secure them with the corresponding nuts from below. Tighten firmly but do not overtighten, as this can damage the plate or hydrofoil.
- Once installation is complete, reconnect the battery and conduct a water test at low speeds to check for proper performance and handling.
Troubleshooting & FAQ
How do I know if this hydrofoil will fit my specific engine model?
This hydrofoil is designed for universal fitment on most outboard and stern drive motors in the 40-300 HP range. The key is to check the size of your engine's anti-cavitation plate and ensure there is enough flat surface area to mount the hydrofoil, which measures 16.93 x 14.17 inches.
What is the main benefit of a "whale tail" style hydrofoil?
The "whale tail" design offers a large surface area that provides significant stern lift. This helps the boat get on plane much faster (improving the "holeshot"), allows it to stay on plane at lower speeds, increases fuel efficiency, and reduces common issues like porpoising and cavitation.
How can I prevent the mounting hardware from loosening over time?
We recommend using a thread-locking compound on the bolt threads during installation. Additionally, it is good practice to periodically check the tightness of the nuts and bolts as part of your regular boat maintenance routine.
What are the signs that my hydrofoil is installed incorrectly?
If the boat pulls to one side, experiences unusual vibrations, or if the engine seems to over-rev without generating thrust (ventilation), the hydrofoil may be misaligned. Ensure it is mounted perfectly centered on the anti-cavitation plate and is parallel to the bottom of the boat.
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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