Hydrofoil Stabilizer – Fits Outboard/Stern Drive 8–40 HP (Replaces UanofCn FO2002, SeaSierra FO2002)
Hydrofoil Stabilizer – Fits Outboard/Stern Drive 8–40 HP (Replaces UanofCn FO2002, SeaSierra FO2002) 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 Drive 8–40 HP (Replaces ...
Hydrofoil Stabilizer – Fits Outboard/Stern Drive 8–40 HP (Replaces UanofCn FO2002, SeaSierra FO2002) is backordered and will ship as soon as it is back in stock.
Product Details
The NorthBoat FO2002 Outboard Hydrofoil Stabilizer is a versatile whale tail hydrofoil designed for outboard motors and stern drives in the 8–40 HP range. It improves boat performance by reducing bow rise and enabling faster planing with enhanced stability.
This part is a direct replacement for UanofCn FO2002 and SeaSierra FO2002.
- Improves thrust for quicker planing at lower speeds and helps reduce porpoising.
- Bolt-on installation requires drilling and is secured directly to the cavitation plate.
- Made from durable marine-grade reinforced Nylon-PA66 plastic.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| NorthBoat | FO2002 |
| UanofCn | FO2002 |
| SeaSierra | FO2002 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Application | HP Range | Notes |
|---|---|---|---|
| Mercury | Most outboards | 8-40 HP | Except Mercury 40, 50, 60 Four Strokes |
| Johnson/Evinrude | Most outboards | 8-40 HP | |
| Yamaha | Most outboards | 8-40 HP | Except Yamaha 350 HP |
| Honda | Most outboards | 8-40 HP | Except Honda 200 HP and higher |
| Suzuki | Most outboards | 8-40 HP | |
| Tohatsu/Nissan | Most outboards | 8-40 HP |
| Brand | Application | Notes |
|---|---|---|
| MerCruiser | Most models | Except Bravo II and some Bravo III with only one anode on bottom of cavitation plate |
| Volvo Penta | SX-A, DPS, DPR, DPH, 280, 290 series | Requires longer bolts and fender washers (not included). Not compatible with Volvo Ocean Series XDP |
Technical Specs
- Product Type
- Whale Tail Hydrofoil Stabilizer
- Installation
- Bolt-on, drilling required
- Connection
- Bolted to cavitation plate
- Housing Material
- Marine Grade Reinforced Nylon-PA66 Plastic
- Housing Color
- Red (also available in Silver, Blue)
- Dimensions
- 13.5" × 14" (343 mm × 356 mm)
- Weight
- 1.34 kg (2.94 lb)
- Fitting Type
- Direct mount to cavitation plate
- Mounting Hardware
- Includes stainless steel mounting hardware
- Other Technical Attributes
- Helps reduce porpoising, improves thrust for quicker planing at lower speeds
What’s in the Box
- 1 x Hydrofoil Stabilizer
- 1 x Drill bit
- 4 x Stainless Steel Nuts and Bolts
- 1 x Installation Instructions
Installation Notes
- Ensure the engine is off and the battery is disconnected for safety.
- Position the hydrofoil onto the cavitation plate, ensuring it is centered and aligned properly.
- Use a marker to carefully mark the positions for the four mounting holes.
- Remove the hydrofoil and use the included drill bit to drill the marked holes through the cavitation plate.
- Place the hydrofoil back onto the plate, aligning it with the newly drilled holes.
- Insert the stainless steel bolts from the top and secure them with the nuts from the bottom.
- Tighten all nuts and bolts evenly and securely. Do not overtighten.
- Reconnect the battery and test the boat's performance on the water.
Troubleshooting & FAQ
What is the main benefit of this hydrofoil?
It improves boat performance by reducing bow rise and porpoising. This allows the boat to get on plane faster and maintain it at lower speeds, which can also improve fuel efficiency.
Is drilling required for installation?
Yes, this is a bolt-on hydrofoil that requires drilling four holes through your outboard or stern drive's cavitation plate. All necessary mounting hardware, including a drill bit, is included in the package.
Will this fit my Mercury 50 HP Four Stroke engine?
No, it is specifically not compatible with Mercury 40, 50, or 60 HP Four Stroke models. Please review the compatibility tables carefully before purchasing.
Can I install this on a Volvo Penta Ocean Series XDP drive?
No, this hydrofoil is not compatible with the Volvo Ocean Series XDP drive. It is also not compatible with MerCruiser Bravo II drives.
What is the hydrofoil made of?
It is constructed from a high-strength, marine-grade reinforced Nylon-PA66 plastic designed to withstand harsh marine environments.
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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