Hydrofoil Stabilizer – Fits Outboards & Stern Drives 40-350 HP (Sport 300)
Hydrofoil Stabilizer – Fits Outboards & Stern Drives 40-350 HP (Sport 300) is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
If the return is due to our error or a defective item, we’ll make it right.
Please contact us before returning any item.
Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
Tracking information will be provided once your order ships.
Hydrofoil Stabilizer – Fits Outboards & Stern Drives 40-350 HP ...
Hydrofoil Stabilizer – Fits Outboards & Stern Drives 40-350 HP (Sport 300) is backordered and will ship as soon as it is back in stock.
Product Details
Improve your boat's performance with the Sea Sierra Whale Tail Hydrofoil Stabilizer (Sport 300). This universal stabilizer is designed for a broad range of outboard and stern drive applications, fitting most engines from 40 to 350 HP to enhance planing, stability, and overall handling.
- Installs via a secure bolt-on method; drilling is required.
- Constructed from durable, marine-grade UV-resistant reinforced Nylon PA66 plastic.
- Package includes all necessary installation hardware, including a drill bit and bolts.
Engine & Model Compatibility
This hydrofoil offers universal fitment for most outboard motors and stern drives ranging from 40 HP to 350 HP, including both 2-stroke and 4-stroke engines. Please verify the dimensions of your engine's anti-ventilation plate to ensure proper fit before installation.
Technical Specs
- Product Type
- Hydrofoil Stabilizer (Whale Tail)
- Installation
- Bolt-on with included hardware
- Material
- Marine Grade UV-Resistant Reinforced Nylon PA66 Plastic
- Compatibility
- 40-350 HP Outboard Motors and Stern Drives
- Dimensions
- Approximately 17 inches (W) × 14.4 inches (H)
- Weight
- 1.76 ounces (50 grams) package weight
- Package Dimensions
- 0.39 × 0.39 × 0.39 inches (package)
- Color
- Available in multiple colors (varies by SKU)
- Assembly Required
- No
- Engine Types
- Compatible with 2-Stroke & 4-Stroke engines
- Installation Hardware
- Included (bolts, nuts, drill bit)
What’s in the Box
- 1 × Sport 300 Outboard Hydrofoil Stabilizer
- 1 × Installation Instruction
- 1 × Drill bit
- 4 × Sets of Install Bolts
Installation Notes
Installation requires drilling into the anti-ventilation plate of the lower unit. The package includes all necessary hardware and a drill bit for a straightforward installation. For boat owners who prefer a non-permanent solution, alternative clamp-on models are available that do not require drilling.
Troubleshooting & FAQ
Will this fit my specific engine model?
This is a universal stabilizer designed for most outboard and stern drive motors from 40 to 350 HP. We recommend measuring your engine's anti-ventilation plate to confirm it can accommodate the hydrofoil's dimensions (approx. 17" W x 14.4" H) before ordering.
What are the main benefits of using this hydrofoil?
The Sport 300 is designed to get your boat on plane faster, improve stability and handling, maintain plane at lower speeds, and provide a smoother ride. It can also help reduce fuel consumption by minimizing porpoising and cavitation.
Is drilling required for installation?
Yes, this model uses a bolt-on design for a secure and rigid fit, which requires drilling four small holes in your engine's anti-ventilation plate. All mounting hardware and a drill bit are included.
What is the hydrofoil made of?
It is constructed from a high-strength, marine-grade reinforced Nylon PA66 plastic, which is engineered to resist UV degradation and withstand harsh aquatic environments.
What signs indicate I might need a hydrofoil?
Common issues that a hydrofoil can solve include a bow-high attitude during acceleration, excessive "porpoising" (the bow bouncing up and down), and difficulty staying on plane at lower speeds. It also improves steering response and stability in turns.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
