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 universal hydrofoil stabilizer is designed for a wide range of boats, fitting most 5 150 HP outboard motors and stern drives. Crafted from high strength, reinforced Nylon PA66 plastic, it improves on plane performance, stability, and handling. The unique dorsal fin design enhances tracking and control during turns. It serves as a direct replacement for SeaSierra

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

This universal hydrofoil stabilizer is designed for a wide range of boats, fitting most 5-150 HP outboard motors and stern drives. Crafted from high-strength, reinforced Nylon PA66 plastic, it improves on-plane performance, stability, and handling. The unique dorsal fin design enhances tracking and control during turns.

It serves as a direct replacement for SeaSierra 19HS, Uanofcn FO2001, JLM Marine Hydrofoil Stabilizer, and HS001 Doel-Fin, offering broad compatibility with brands like Mercury, Yamaha, Honda, Suzuki, and Tohatsu. Note the specific exceptions for certain Volvo Penta and BMW models.

• Installation Method: Bolt-on (drilling is required).
• Included Hardware: Comes with stainless steel mounting bolts, nuts, washers, and a drill bit.
• Durable Construction: Made from UV-resistant, marine-grade reinforced plastic for longevity.

Part Number Cross-Reference

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

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 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 Guide

1. Safety First: Disconnect the boat's battery before starting any work on the engine.
2. Position the Hydrofoil: Place the two halves of the hydrofoil onto the anti-cavitation plate of your lower unit, ensuring a snug and centered fit.
3. Mark the Holes: Use a pencil or marker to mark the four drill locations through the mounting holes of the hydrofoil.
4. Drill the Holes: Remove the hydrofoil and carefully drill the four marked holes using the included 6.5mm drill bit.
5. Apply Sealant: For added protection against water intrusion, apply a small amount of marine-grade sealant around the drilled holes.
6. Secure the Hydrofoil: Position the hydrofoil halves back onto the plate and insert the stainless steel bolts. Secure them tightly with the provided washers and nuts.
7. Final Check: Ensure all hardware is firmly tightened and the hydrofoil is secure before reconnecting the battery and launching the boat.

Troubleshooting & FAQ

Q: How do I know if this hydrofoil will fit my engine?
A: This is a universal hydrofoil designed for most outboard and stern drive engines from 5 to 150 HP. Measure your engine's anti-cavitation plate to ensure the dimensions (H: 10-1/4", W: 8-1/4") will fit. Please note it is not compatible with Volvo Penta 280/290 outdrives or BMW outdrives for engines over 50HP.

Q: What is the benefit of the dorsal fin design?
A: The dorsal fin acts like a small keel to improve tracking and stability, especially during turns. It helps reduce prop ventilation (cavitation) and provides better handling at both low trolling speeds and when on plane.

Q: Is drilling always required for installation?
A: Yes. This is a bolt-on hydrofoil that requires drilling four holes into your engine's anti-cavitation plate. This ensures a secure and permanent installation. All necessary stainless steel hardware and a drill bit are included to simplify the process.

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.