Hydrofoil Stabilizer – Fits Outboard Motors & Stern Drives 5-150 HP (Replaces SeaSierra 19HS, Uanofcn FO2001, Davis Doel-Fin 440)
Hydrofoil Stabilizer – Fits Outboard Motors & Stern Drives 5-150 HP (Replaces SeaSierra 19HS, Uanofcn FO2001, Davis Doel-Fin 440) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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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.
Tracking information will be provided once your order ships.
Hydrofoil Stabilizer – Fits Outboard Motors & Stern Drives 5-15...
Hydrofoil Stabilizer – Fits Outboard Motors & Stern Drives 5-150 HP (Replaces SeaSierra 19HS, Uanofcn FO2001, Davis Doel-Fin 440) is backordered and will ship as soon as it is back in stock.
Product Details
This universal Hydrofoil Stabilizer – Fits Outboard Motors & Stern Drives 5-150 HP (Dorsal Fin Style) is designed for 5-150 HP outboard motors and stern drives, and is suitable for most boats up to 200 HP. Its dorsal fin design enhances stability and performance on the water, reducing cavitation and porpoising for a smoother ride.
It serves as a direct cross-reference for SeaSierra 19HS, Uanofcn FO2001, and Davis Doel-Fin 440.
- Installs via bolt-on method (drilling is required).
- Constructed from durable, UV-resistant reinforced nylon plastic for marine environments.
- Includes a complete set of stainless steel mounting hardware.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| SeaSierra | 19HS |
| Uanofcn | FO2001 |
| Davis | Doel-Fin 440 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model Type | Rated HP | Application | Notes |
|---|---|---|---|---|
| All Brands | Outboard Motors | 5–150 HP | Universal fit | Not compatible with Volvo Penta 280/290 outdrives and BMW Outdrives for engines over 50HP |
| All Brands | Stern Drives | 5–150 HP | Universal fit | Compatible with Volvo Penta 270 outdrive |
| All Brands | Outboards/Outdrives | Up to 200 HP | Universal fit | Performance may vary based on boat configuration |
Technical Specs
- Product Type
- Hydrofoil Stabilizer, Dorsal Fin Style
- Installation
- Bolt-on (drilling required)
- Housing Material
- Reinforced Nylon PA66 Plastic
- Housing Color
- Black
- Dimensions
- H: 260 mm (10-1/4 inches), W: 210 mm (8-1/4 inches)
- Fitting Type
- Bolt-on with stainless steel hardware
- Compatible HP Range
- 5-150 HP (up to 200 HP)
- Other Technical Attributes
- UV-Resistant, Marine-grade construction
What’s in the Box
- 1 x Hydrofoil Stabilizer (Dorsal Fin Style)
- 4 x Stainless Steel Mounting Hardware Set (bolts, nuts)
- 1 x Installation Guide
Installation Notes
This hydrofoil stabilizer requires drilling four holes into the anti-cavitation plate of your lower unit. Measure carefully before drilling to ensure proper alignment. All necessary stainless steel mounting hardware is included for a secure installation.
Troubleshooting & FAQ
How do I know if this hydrofoil will fit my specific engine?
This hydrofoil offers a universal fit for most outboard and stern drive engines from 5-150 HP. However, it is not compatible with Volvo Penta 280/290 series and BMW outdrives on engines over 50 HP. Always measure your anti-cavitation plate and compare it with the product dimensions before purchasing.
What are the main benefits of the dorsal fin style?
The dorsal fin provides additional stability and improved tracking, especially in turns. It helps reduce porpoising and cavitation, leading to a smoother ride, faster planing, and potentially better fuel economy.
Is drilling into the anti-cavitation plate safe for my engine?
Yes, when performed correctly, it is a standard and safe procedure. The anti-cavitation plate is robust enough for this modification. Follow the included installation guide carefully to ensure you drill in the recommended locations.
What tools are needed for installation?
You will need a power drill, appropriate drill bits for metal, a wrench or socket set to tighten the mounting hardware, and a measuring tape to ensure correct placement.
How can I tell if the hydrofoil is working correctly?
After installation, you should notice your boat gets on plane at lower speeds, experiences less bow rise, and maintains better stability at various speeds. Handling during turns should also feel more controlled.
Can this hydrofoil be painted to match my engine?
Yes, the reinforced nylon material can be painted. For a durable finish, lightly sand the surface, apply a plastic adhesion promoter, and use a quality marine-grade paint.
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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