Hydrofoil Stabilizer – Fits Outboard & Sterndrive Motors 5-150 HP
Hydrofoil Stabilizer – Fits Outboard & Sterndrive Motors 5-150 HP is backordered and will ship as soon as it is back in stock.
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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.
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Hydrofoil Stabilizer – Fits Outboard & Sterndrive Motors 5-150 HP
Hydrofoil Stabilizer – Fits Outboard & Sterndrive Motors 5-150 HP is backordered and will ship as soon as it is back in stock.
Product Details
This Hydrofoil Stabilizer is a versatile marine accessory designed for outboard and sterndrive engines ranging from 5-150 HP. Made of durable, UV-resistant reinforced PA66 nylon plastic, it ensures long-lasting performance in both saltwater and freshwater environments. Its primary function is to improve planing speed, reduce porpoising, and enhance overall boat stability for a smoother, safer ride.
It serves as a direct-fit alternative for similar Doel Fin style hydrofoils, offering comparable performance benefits.
- Installs via a simple bolt-on process with included hardware.
- Engineered from marine-grade, UV-resistant reinforced PA66 plastic.
- The kit includes stainless steel mounting hardware and a drill bit.
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Notes |
|---|---|---|---|---|
| Yamaha | Various Outboard Models | 5-40 HP | 2- & 4-Stroke | Suitable for most models |
| Mercury | Various Outboard Models | 5-40 HP | 2- & 4-Stroke | May not fit Mercury 4-Stroke 40/50/60 HP models |
| Honda | Various Outboard Models | 5-40 HP | 4-Stroke | Suitable for most models |
| Suzuki | Various Outboard Models | 5-40 HP | 2- & 4-Stroke | Suitable for most models |
| Tohatsu | Various Outboard Models | 5-40 HP | 2- & 4-Stroke | Suitable for most models |
| Various | Sterndrive/Outdrive Units | Various | Various | Universal application for most sterndrive units |
Technical Specs
- Product Type
- Hydrofoil Stabilizer
- Installation
- Bolt-on (hardware included)
- Material
- Reinforced Nylon PA66 Plastic (Marine Grade, UV-Resistant)
- Color
- White (also available in Black, Blue, Grey, Yellow)
- Dimensions
- Width: 14 inches, Height: 13.5 inches (approximate)
- Hardware
- 4 sets of stainless steel screws and nuts, includes drill bit
- Compatible HP Range
- 5-40 HP (suitable for up to 150 HP on some applications)
- Operating Environment
- Marine (saltwater/freshwater)
- Other Technical Attributes
- Reinforced structure for enhanced durability
What’s in the Box
- 1 x Hydrofoil Stabilizer (White PA66 Plastic)
- 4 x Sets of stainless steel screws and nuts
- 1 x 6.5mm drill bit
- 1 x Installation instruction manual
Installation Notes
- Disconnect the battery before beginning installation.
- Position the hydrofoil on the engine's cavitation plate, ensuring it is centered and level.
- Use a pencil or marker to mark the drilling locations through the mounting holes on the hydrofoil.
- Remove the hydrofoil and carefully drill the marked holes using the included 6.5mm drill bit.
- Place the hydrofoil back onto the cavitation plate, aligning the holes.
- Insert the stainless steel screws from the top and secure them with the nuts from the bottom.
- Tighten all hardware securely, but do not overtighten to avoid damaging the plate.
- Reconnect the battery and test the boat at low speeds to ensure proper function before regular use.
Troubleshooting & FAQ
Will this fit my specific XYZ HP engine?
This hydrofoil has a universal design intended for most outboard and sterndrive motors from 5-40 HP. However, there are known exceptions, such as some Mercury 4-stroke 40/50/60 HP models. Always compare your cavitation plate's size and shape to the product dimensions (approx. 14" W x 13.5" H) to ensure a good fit.
What is the maximum horsepower this can handle?
While a great fit for engines in the 5-40 HP range, it can be suitable for applications up to 150 HP. Performance on higher horsepower engines depends heavily on the specific boat hull, engine type, and water conditions. For engines over 40 HP, monitor performance closely.
How does this compare to a brand-name Doel Fin?
This product is designed to function similarly to a Doel Fin, offering benefits like faster planing and improved stability. It is made from high-strength, reinforced PA66 nylon plastic, which is comparable to materials used in many well-known brands and is built for durability in marine environments.
How do I know if it's installed and working correctly?
A successful installation results in noticeable performance improvements. You should experience a shorter time to get on plane, reduced or eliminated porpoising (bow bouncing), better stability in turns, and a smoother ride in choppy water.
Do I have to drill holes in my engine’s cavitation plate?
Yes, this is a bolt-on stabilizer that requires drilling four holes in the cavitation plate. The kit includes all necessary stainless steel hardware and the correct size drill bit to complete the installation.
What is reinforced PA66 plastic?
PA66 is a type of high-performance nylon known for its exceptional strength, rigidity, and resistance to heat and chemicals. The reinforcement in our marine-grade version adds extra durability and makes it UV-resistant, preventing it from becoming brittle after sun and water exposure.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It has been built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility, with batch inspections for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options will appear at checkout where available.
Warranty & returns?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, please contact our support team with your order details. Returns are accepted within our standard window, provided the item is unused and in its original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against 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 quality control.
Payment & Security
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