Sport-300 Whale Tail Hydrofoil Stabilizer – Fits Outboard Motors & Stern Drives 40-350 HP

Sport-300 Whale Tail Hydrofoil Stabilizer – Fits Outboard Motors & Stern Drives 40-350 HPSport 300 Whale Tail Hydrofoil Stabilizer Fits Outboard Motors & Stern Drives 40 350 HP This marine performance enhancer is designed for a wide range of outboard motors and stern drives from 40 to 350 horsepower. By mounting directly to the anti ventilation plate, it delivers significant improvements in handling, planing speed, and overall fuel efficiency. Directly replaces: SE Sport 300 HydroFoil, HD300 Whale Tail Stabilizer, and FO2003 Whale Tail

Sport-300 Whale Tail Hydrofoil Stabilizer – Fits Outboard Motors & Stern Drives 40-350 HP

This marine performance enhancer is designed for a wide range of outboard motors and stern drives from 40 to 350 horsepower. By mounting directly to the anti-ventilation plate, it delivers significant improvements in handling, planing speed, and overall fuel efficiency.

Directly replaces: SE Sport 300 HydroFoil, HD300 Whale Tail Stabilizer, and FO2003 Whale Tail Hydrofoil.

• Installation Method: Bolt-on (requires drilling into the anti-ventilation plate).
• Housing Material: Constructed from premium quality, UV-resistant Nylon-PA66.
• Included Hardware: Comes with stainless steel mounting screws, nuts, and a 6.5mm drill bit.

Compatible Engine Models

Confirm your engine model and horsepower in the tables below. For help identifying your specific engine, please use the guides linked below.

For Mercury/Mariner 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.

Outboard Motors

Stern Drives

Technical Specifications

Package Contents

• 1 × Outboard Hydrofoil Stabilizer
• 4 × Sets of Stainless Steel Screws and Nuts
• 1 × 6.5mm Drill Bit
• 1 × Installation Instruction

Installation Guide

1. Safety First: Before starting, turn off the engine and disconnect the battery.
2. Position the Hydrofoil: Place the hydrofoil onto the anti-ventilation plate of your lower unit. Center it side-to-side, ensuring it doesn't interfere with the propeller's movement.
3. Mark the Holes: Use a pencil or marker to mark the four drill points through the mounting holes of the hydrofoil onto the plate.
4. Drill the Holes: Remove the hydrofoil. Carefully drill the four marked holes using the included 6.5mm drill bit.
5. Secure the Hydrofoil: Place the hydrofoil back onto the plate. Insert the stainless steel bolts from the top and fasten them securely with the nuts from the bottom.
6. Final Check: Ensure all bolts are tightened evenly and the hydrofoil is firm. Reconnect the battery.

Troubleshooting & FAQ

Q: How do I confirm if this hydrofoil fits my engine?

A: This stabilizer is designed for most outboard motors and stern drives from 40 to 350 HP. Please verify your engine's horsepower is within this range. Note the specific exclusions: it is not compatible with Mercury 40 HP 4-Stroke outboards or Volvo Penta Ocean Series XDP stern drives.

Q: What performance improvements can I expect?

A: This hydrofoil helps your boat get on plane faster, reduces porpoising and cavitation, improves stability and handling, and can enhance fuel efficiency at planing speeds.

Q: Is drilling required for installation?

A: Yes, this is a bolt-on part that requires drilling four holes into the engine's anti-ventilation plate. We include the necessary stainless steel hardware and a 6.5mm drill bit 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.