Hydrofoil Stabilizer – Fits Outboard Motors & Stern Drives 5-150 HP (Dorsal Fin Style)

Hydrofoil Stabilizer – Fits Outboard Motors & Stern Drives 5-150 HP (Dorsal Fin Style)Hydrofoil Stabilizer Fits Outboard Motors & Stern Drives 5 150 HP (Dorsal Fin Style) This is a universal hydrofoil stabilizer designed for 5 150 HP outboard motors and stern drives, and it is suitable for most boats with engines up to 200 HP. Its dorsal fin design enhances stability and improves on plane performance by reducing cavitation and porpoising. This part is a direct replacement for SeaSierra 19HS, Uanofcn FO2001, and Davis Doel Fin 440.

Hydrofoil Stabilizer – Fits Outboard Motors & Stern Drives 5-150 HP (Dorsal Fin Style)

This is a universal hydrofoil stabilizer designed for 5-150 HP outboard motors and stern drives, and it is suitable for most boats with engines up to 200 HP. Its dorsal fin design enhances stability and improves on-plane performance by reducing cavitation and porpoising.

This part is a direct replacement for SeaSierra 19HS, Uanofcn FO2001, and Davis Doel-Fin 440.

• Installation Method: Bolt-on (requires drilling)
• Material: Reinforced, UV-resistant Nylon PA66 plastic for durability
• Hardware: Includes a complete set of stainless steel mounting hardware

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 1 x Hydrofoil Stabilizer (Dorsal Fin Style)
• 4 x Stainless Steel Mounting Hardware Set (bolts, nuts)
• 1 x Installation Guide

Installation Guide

This hydrofoil requires drilling for installation. Professional installation is recommended. Always wear safety glasses and gloves during the process.

1. Step 1: Center the hydrofoil on the anti-cavitation plate of your outboard or stern drive. Ensure it is positioned correctly for optimal performance.
2. Step 2: Use a pencil or marker to mark the four drill points through the mounting holes of the hydrofoil onto the plate.
3. Step 3: Remove the hydrofoil and carefully drill the four marked holes through the anti-cavitation plate.
4. Step 4: Place the hydrofoil back onto the plate, align the holes, and securely fasten it using the included stainless steel bolts and nuts.

Troubleshooting & FAQ

Q: How do I know if this hydrofoil will fit my engine?
A: This stabilizer has a universal design for most 5-150 HP outboard motors and stern drives. However, it is not compatible with Volvo Penta 280/290 outdrives or BMW Outdrives for engines over 50HP. We recommend measuring your anti-cavitation plate to ensure the hydrofoil's dimensions (H: 260 mm, W: 210 mm) will fit before purchasing.

Q: Do I need to drill holes to install this part?
A: Yes, installation requires drilling four holes into the anti-cavitation plate of your lower unit. All necessary stainless steel mounting hardware is included in the package to complete the installation.

Q: What is the main benefit of the dorsal fin design?
A: The dorsal fin provides improved directional stability and better handling, especially during turns. It helps the boat get on plane quicker, reduces cavitation (propeller ventilation), and minimizes porpoising for a smoother, more efficient ride.

Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.