Hydrofoil Stabilizer – Fits Outboard Motors & Stern Drives 5-150 HP (Replaces SeaSierra 19HS, Uanofcn FO2001)
Hydrofoil Stabilizer – Fits Outboard Motors & Stern Drives 5-150 HP (Replaces SeaSierra 19HS, Uanofcn FO2001) 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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Hydrofoil Stabilizer – Fits Outboard Motors & Stern Drives 5-15...
Hydrofoil Stabilizer – Fits Outboard Motors & Stern Drives 5-150 HP (Replaces SeaSierra 19HS, Uanofcn FO2001) 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 engineered for a wide range of boats with 5-150 HP outboard motors and stern drives (supporting some vessels up to 200 HP). Its dorsal fin design, constructed from high-strength reinforced Nylon PA66 plastic, improves on-plane performance, increases stability, and reduces cavitation.
This unit serves as a direct replacement for SeaSierra 19HS, Uanofcn FO2001, JLM Marine Hydrofoil Stabilizer, and HS001 Doel-Fin models.
- Features a bolt-on installation method, requiring drilling into the cavitation plate.
- Built with marine-grade, UV-resistant materials to withstand harsh saltwater and freshwater environments.
- The kit includes all necessary stainless steel mounting hardware and a 6.5mm drill bit for a complete setup.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| SeaSierra | 19HS |
| Uanofcn | FO2001 |
| JLM Marine | Hydrofoil Stabilizer |
| Doel-Fin | HS001 |
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: 10-1/4 inches (260 mm), W: 8-1/4 inches (210 mm)
- 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
- 4 x Sets of Stainless Steel Mounting Hardware (bolts, nuts, washers)
- 1 x Drill bit (6.5mm)
- 1 x Installation Instructions
Installation Notes
- Ensure the engine is off and the boat is secured on a trailer or lift before beginning.
- Center the hydrofoil on the anti-cavitation plate of your motor. Verify it does not obstruct the propeller's path of motion.
- Use a pencil or marker to mark the four drill points on the plate through the hydrofoil's mounting holes.
- Remove the hydrofoil and carefully drill the marked holes using the included 6.5mm drill bit.
- Reposition the hydrofoil, aligning it with the newly drilled holes.
- Insert the stainless steel bolts from the top down, placing a washer and nut on each bolt from underneath the plate.
- Tighten all nuts evenly until the hydrofoil is firmly secured. Do not overtighten to avoid damaging the plate.
Troubleshooting & FAQ
Will this hydrofoil fit my specific motor model?
This is a universal stabilizer designed for most outboard and stern drive engines from 5-150 HP. It is compatible with all major brands like Mercury, Yamaha, Honda, and Suzuki. Please note the specific exclusions for Volvo Penta 280/290 and certain BMW outdrives over 50 HP.
What performance benefits can I realistically expect?
Benefits vary by boat hull, weight, and operating conditions, but users typically report getting on plane faster, maintaining plane at lower speeds, reduced porpoising and bouncing, and improved stability and handling.
Is it safe to drill into my engine's cavitation plate?
Yes, drilling into the cavitation plate is the standard and accepted method for mounting hydrofoils. The plate is designed to be strong enough for this modification. Ensure drilling is done carefully according to the instructions.
How do I know if the hydrofoil is installed correctly?
A correct installation will be perfectly centered on the cavitation plate, with the hydrofoil sitting level. All mounting hardware should be tight, and there should be no wobble or movement. Ensure it does not interfere with the propeller or steering linkage.
How does the Nylon PA66 material compare to aluminum hydrofoils?
Nylon PA66 is a high-strength, impact-resistant engineering plastic that is impervious to corrosion and UV damage, making it ideal for marine environments. Unlike aluminum, it will not corrode, bend, or fatigue from vibration over time.
Does the hydrofoil require any regular maintenance?
The hydrofoil itself is maintenance-free. However, it is good practice to periodically check that the stainless steel mounting bolts remain tight as part of your regular pre-launch inspection.
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.
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