Whale Tail Hydrofoil Stabilizer – Fits 40-350 HP Outboards & Stern Drives (Sport 300)

Whale Tail Hydrofoil Stabilizer – Fits 40-350 HP Outboards & Stern Drives (Sport 300)

This hydrofoil stabilizer is designed for universal compatibility with most outboard and stern drive engines ranging from 40 to 350 HP. It enhances performance by providing faster planing, improved stability, and better handling.

Engineered for a broad range of applications, this whale tail helps reduce planing time, minimize porpoising, and can even contribute to better fuel economy by allowing the boat to maintain plane at lower speeds.

• Installation Method: Bolt-on (requires drilling)
• Material: Marine Grade UV-Resistant Reinforced Nylon PA66 Plastic
• Engine Compatibility: 2-Stroke & 4-Stroke

Compatible Engine Models

Confirm your engine model/year in the table below.

This is a universal-fit product compatible with most outboard motors and stern drives from 40 HP to 350 HP.

Technical Specifications

Package Contents

• 1 × Sport 300 Outboard Hydrofoil Stabilizer
• 1 × Installation Instruction
• 1 × Drill bit
• 4 × Sets of Install Bolts

Installation Guide

Installation requires drilling into the anti-ventilation plate of your engine's lower unit. Ensure the engine is off and disconnected from any power source before starting.

1. Position the hydrofoil onto the anti-ventilation plate. Ensure it is centered and level.
2. Mark the locations for the four mounting holes through the hydrofoil onto the plate.
3. Remove the hydrofoil and carefully drill the marked holes using the included drill bit.
4. Place the hydrofoil back onto the plate, aligning the holes.
5. Insert the bolts from the top and secure them with the nuts from the bottom.
6. Tighten all four sets of bolts securely. Check for a firm fit before operating your boat.

Troubleshooting & FAQ

Q: How do I know if this hydrofoil will fit my engine?
A: This hydrofoil is a universal design that fits most outboard and stern drive engines between 40 and 350 HP. It mounts by drilling into the anti-ventilation plate, which is a common feature on most lower units in this power range.

Q: Do I have to drill holes in my engine to install this?
A: Yes, this model is a bolt-on design that requires drilling four holes into the anti-ventilation plate. The package includes all necessary hardware and a drill bit for a complete installation.

Q: What is the main benefit of installing a hydrofoil?
A: The primary benefits include getting on plane faster, improving stability and handling, maintaining plane at lower speeds, and reducing porpoising (bow bouncing) and cavitation. This leads to a smoother ride and can improve fuel efficiency.

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.