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 5-150 HP outboard motors and stern drives, making it a versatile fit for most boats up to 200 HP. Constructed from high-strength, UV-resistant reinforced Nylon PA66 plastic, this dorsal fin-style hydrofoil is built for the marine environment to improve performance and stability.

It is compatible with all major outboard brands including Mercury, Yamaha, Honda, Suzuki, Tohatsu, and Johnson/Evinrude. This unit serves as a direct replacement for SeaSierra 19HS, Uanofcn FO2001, JLM Marine Hydrofoil Stabilizer, and HS001 Doel-Fin.

• Requires drilling for bolt-on installation.
• Crafted from durable, marine-grade Nylon PA66 plastic.
• Includes stainless steel mounting hardware and a drill bit for convenience.

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. Disconnect the battery and ensure the engine is fully tilted up and secured.
2. Position the hydrofoil on the cavitation plate, ensuring it is centered and does not interfere with the propeller's movement.
3. Mark the drilling locations on the cavitation plate using the holes in the hydrofoil as a template.
4. Remove the hydrofoil and carefully drill the marked holes using the included 6.5mm drill bit.
5. Place the hydrofoil back onto the cavitation plate, aligning the holes.
6. Insert the stainless steel bolts from the top and secure them with washers and nuts from the bottom.
7. Tighten the hardware evenly until the hydrofoil is firmly secured. Do not overtighten, as this can damage the cavitation plate.
8. Lower the engine and visually inspect for proper clearance before reconnecting the battery.

Troubleshooting & FAQ

Q: How do I know if this hydrofoil will fit my engine?
A: This hydrofoil is a universal fit for most outboard motors and stern drives from 5 to 150 HP. It is not compatible with specific models like Volvo Penta 280/290 outdrives or BMW outdrives on engines over 50 HP. Always measure your cavitation plate and compare it to the product dimensions (10-1/4" H x 8-1/4" W) to ensure proper clearance.

Q: Will I need to drill holes in my engine's cavitation plate?
A: Yes, this is a bolt-on installation that requires drilling four holes in the cavitation plate. The kit includes the necessary stainless steel hardware and a 6.5mm drill bit for your convenience.

Q: What are the signs my boat could benefit from a hydrofoil?
A: If your boat struggles with slow planing, porpoising (the bow bouncing up and down), or cavitation (propeller losing its grip on the water), a hydrofoil can often improve performance. It helps lift the stern, allowing the boat to get on plane faster at lower speeds and improving stability.

Q: What is the difference between an OEM and an aftermarket part?
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.