Marine Whale Tail Hydrofoil Stabilizer – Fits Outboard Motors 40-300 HP (Replaces FO2003)

Marine Whale Tail Hydrofoil Stabilizer – Fits Outboard Motors 40-300 HP

This whale tail style hydrofoil stabilizer is designed for a universal fit on most outboard and sterndrive motors from 40 to 300 HP. It is engineered to improve performance by providing lift, reducing planing time, and enhancing stability at various speeds. This stabilizer addresses common issues such as porpoising, cavitation, and chine walking for a smoother, more controlled ride.

This unit is a direct replacement for part numbers like SeaSierra FO2003, NorthBoat FO2003, SupremeMarine FO2003, and UANOFCN FO2003.

• Installation: Mounts directly onto the anti-cavitation plate (requires drilling).
• Material: Constructed from high-strength, reinforced Nylon PA66 marine-grade plastic.
• Included Hardware: Comes with a full set of stainless steel mounting bolts and nuts.

Compatible Engine Models

Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

For Yamaha owners, here’s a guide to help you identify your engine’s serial/model: Yamaha Serial Number Guide. You can also review exploded diagrams to verify part numbers: Yamaha Parts Diagrams & Catalog.

For Johnson/Evinrude owners, here’s a guide to help you identify your engine’s serial/model: Johnson Serial Number Guide.

For Suzuki owners, You can review exploded diagrams here to verify part numbers: Suzuki Parts Diagrams & Catalog.

Universal Application

Incompatible Models

Technical Specifications

Package Contents

• 1 x Hydrofoil Stabilizer (FO2003)
• 4 x Set of Stainless Steel Screws and Nuts
• 1 x Drill Bit (6.5mm)
• 1 x Installation Instruction

Installation Guide

1. Center the hydrofoil on the anti-cavitation plate of your outboard or sterndrive motor. Ensure it is positioned correctly for optimal water flow.
2. Once aligned, use a marker to precisely mark the four mounting hole locations on the cavitation plate.
3. Remove the hydrofoil and carefully drill the four marked holes using the included 6.5mm drill bit.
4. Place the hydrofoil back onto the plate, aligning its holes with the newly drilled holes.
5. Insert the four stainless steel bolts from the top down through the hydrofoil and the cavitation plate.
6. Secure each bolt from underneath using the provided stainless steel nuts. Tighten them firmly and evenly.
7. Before use, perform a final check to ensure all mounting hardware is securely fastened.

Troubleshooting & FAQ

How do I confirm this hydrofoil fits my engine?
This hydrofoil has a universal design for most outboard and sterndrive motors from 40 to 300 HP. Please carefully review the "Compatible Engine Models" and "Incompatible Models" tables to check for specific exceptions, such as for certain Mercury, Yamaha, and Honda engines. Note that installation always requires drilling into the anti-cavitation plate.

What are the benefits of installing this hydrofoil?
This hydrofoil is designed to improve your boat's performance by reducing or eliminating common issues like porpoising, cavitation, and chine walking. Its crescent shape helps funnel water for increased thrust, which cuts planing time dramatically and allows the boat to stay on plane at lower speeds. This leads to improved fuel economy, better stability, and a smoother overall ride.

Is drilling required for installation?
Yes, installation requires drilling four holes into your motor's anti-cavitation plate to securely mount the hydrofoil. The package includes all necessary stainless steel mounting hardware (bolts and nuts) and the correct size drill bit to complete the installation.

OEM vs. Aftermarket?
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.

How fast do you ship and how much does it cost?
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.

What is your warranty and return policy?
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.