Whale Tail Hydrofoil Stabilizer – Fits Outboard Motors 8-40 HP (Replaces Sport 200)

Whale Tail Hydrofoil Stabilizer – Fits Outboard Motors 8-40 HP (Replaces Sport 200)

This hydrofoil stabilizer is designed for outboard motors ranging from 8-40 HP. Its compatibility extends to many larger engine models up to 300 HP, providing broad application across various boats. Please note, it is not compatible with Mercury 4-stroke 40/50/60 HP engines.

The "whale tail" design improves boat performance by reducing bow rise, providing better stability, and increasing fuel efficiency. The crescent-shaped surface is engineered for improved water flow and lift, helping your boat get on plane faster and maintain it at lower speeds.

• Installation Method: Bolt-on (requires drilling)
• Housing Material: Reinforced Nylon PA66 Plastic (UV-Resistant)
• Included Hardware: Stainless steel mounting screws and a drill bit are included.

Compatible Engine Models

Confirm your engine model/year in the table below. 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.

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.

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

Technical Specifications

Package Contents

• 1 x Hydrofoil Stabilizer (Sport 200 Style)
• 4 x Stainless Steel Mounting Screws (SS316)
• 1 x Drill Bit
• 1 x Installation Instructions

Installation Guide

1. Ensure the engine is off and the boat is securely positioned out of the water.
2. Position the hydrofoil onto the anti-cavitation plate of your outboard motor, centering it so it is flush against the plate.
3. Mark the locations for the four mounting holes through the guides on the hydrofoil.
4. Remove the hydrofoil and drill the four marked holes using the included drill bit.
5. Align the hydrofoil with the newly drilled holes and secure it with the included mounting hardware.
6. Check that the hydrofoil is tight and does not interfere with the propeller's movement.

Troubleshooting & FAQ

How do I know if this hydrofoil will fit my engine?

This hydrofoil is designed for most outboard motors from 8 to 40 HP and also fits many engines up to 300 HP. However, it is not compatible with Mercury 4-stroke 40, 50, or 60 HP models. Always measure your engine's anti-cavitation plate to ensure the 13.5" x 14" hydrofoil will fit correctly before drilling.

What tools are required for installation?

Installation requires drilling four holes in your engine's anti-cavitation plate. A drill bit is included in the package, but you will need your own power drill to complete the installation.

What are the main benefits of installing this whale tail?

The primary benefits include getting on plane faster at lower speeds, reducing bow rise for better visibility, and improving stability and handling. It also helps reduce porpoising and cavitation, which can lead to better fuel efficiency.

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.