Hydrofoil Stabilizer – Fits Most Brands 5–150 HP (Doel-Fin Style)
Hydrofoil Stabilizer – Fits Most Brands 5–150 HP (Doel-Fin Style) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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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.
Tracking information will be provided once your order ships.
Hydrofoil Stabilizer – Fits Most Brands 5–150 HP (Doel-Fin Style)
Hydrofoil Stabilizer – Fits Most Brands 5–150 HP (Doel-Fin Style) is backordered and will ship as soon as it is back in stock.
Product Details
This Hydrofoil Stabilizer for Outboard Motors improves boat performance by reducing bow rise, eliminating porpoising, and enhancing overall stability. It is designed for a universal fit on most outboard and sterndrive motors from major brands including Yamaha, Mercury, Honda, Suzuki, and Tohatsu in the 5–150 HP range.
This aftermarket hydrofoil provides a high-performance alternative to other dorsal fin style stabilizers.
- Installation is a simple bolt-on process with included mounting hardware.
- Constructed from marine-grade, UV-resistant reinforced PA66 plastic for durability.
- Includes stainless steel hardware and a 6.5mm drill bit for a complete setup.
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This stabilizer offers a universal fit for most outboard motors within the 5 to 150 HP range. Compatibility has been noted with the following brands, though it is not limited to them. Installation requires drilling.
| Brand | Model | Rated HP | Stroke | Notes |
|---|---|---|---|---|
| Yamaha | Outboards | 5-150 | 2- & 4-Stroke | Universal fit |
| Mercury | Outboards | 5-150 | 2- & 4-Stroke | Universal fit |
| Honda | Outboards | 5-150 | 4-Stroke | Universal fit |
| Suzuki | Outboards | 5-150 | 2- & 4-Stroke | Universal fit |
| Tohatsu | Outboards | 5-150 | 2- & 4-Stroke | Universal fit |
| Johnson/Evinrude | Outboards | 5-150 | 2- & 4-Stroke | Verified by user review for 15 HP models |
Technical Specs
- Product Type
- Hydrofoil Stabilizer
- Installation
- Bolt-on (includes mounting hardware)
- Fuel Type
- Compatible with all fuel types
- Connection
- Direct mount to anti-ventilation plate
- Housing Material
- Marine Grade UV-Resistant Reinforced Nylon PA66 Plastic
- Housing Color
- Black (also available in White, Grey, Yellow, Blue)
- Dimensions
- 10-1/4" × 8-1/4" (260 mm × 210 mm)
- Weight
- 1.2 kg (2.64 lbs)
- Fitting Type
- Engine Mount
- Maximum HP Rating
- 150 HP
- Operating Temperature
- -10°C to 60°C (14°F to 140°F)
- Other Technical Attributes
- Dorsal fin style design; includes stainless steel mounting hardware
What’s in the Box
- 1 x Hydrofoil Stabilizer
- 4 x Sets of Stainless Steel Screws and Nuts
- 1 x 6.5mm Drill Bit
- 1 x Installation Instructions
Installation Notes
Installation requires drilling four holes in the anti-ventilation plate of your outboard or sterndrive. The included 6.5mm drill bit is designed specifically for this purpose. Always follow the included installation instructions carefully. Ensure the hydrofoil is centered and level before drilling.
Troubleshooting & FAQ
Will this fit my specific engine model?
This hydrofoil is designed for a universal fit on most outboard and sterndrive motors from 5 to 150 HP. It has been successfully installed on many Yamaha, Mercury, Honda, Suzuki, and Tohatsu motors. However, because it is a drill-on application, we recommend checking your anti-ventilation plate dimensions against the stabilizer's dimensions (10-1/4" × 8-1/4") to ensure adequate space before ordering.
What are the main performance benefits?
The primary benefits are faster planing (improved hole shot), reduced bow rise for better forward visibility, and the elimination of porpoising or bouncing. It also enhances stability and steering at both low and high speeds, which improves handling in rough water and during water sports.
How is this installed?
Installation requires drilling four holes into your engine's anti-ventilation plate. The package contains all necessary stainless steel mounting hardware and a 6.5mm drill bit designed for the task. Full step-by-step instructions are included to guide you through the process.
My boat still porpoises after installation. What should I do?
First, ensure the hydrofoil was installed correctly and is level on the anti-ventilation plate. Porpoising is often related to engine trim angle, so try adjusting your trim settings up or down to find the optimal position. Improper weight distribution in the boat can also be a factor, so consider adjusting your load before making further changes.
How do I maintain the hydrofoil?
The unit is made from durable, marine-grade materials and requires minimal maintenance. We recommend periodically checking that the stainless steel mounting bolts are secure. It's also good practice to inspect the unit for any signs of damage after use, particularly in rough conditions, and to rinse it with fresh water after saltwater operation.
What is an OEM part vs. an Aftermarket part?
This listing is for an aftermarket replacement, not an Original Equipment Manufacturer (OEM) part. It has been engineered to meet or exceed OEM specifications using comparable high-quality materials. Our products are manufactured in an ISO 9002 certified facility and are batch-inspected to ensure quality and consistency.
What are your shipping speeds and costs?
We ship worldwide. Typical transit time is 5–15 days for most regions. Standard shipping is free for all orders. Expedited shipping options, if available for your location, will be presented at checkout.
What is your warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal use conditions. If you experience an issue, please contact our support team with your order details. Returns are accepted within our standard return window for items that are unused and in their original packaging. Please see our full policy page or contact us for instructions.
Safety & Important Info
- Verify the images and specifications against your original part before purchase. If anything appears different—even if your model is listed as compatible—do not proceed with the purchase.
- This product is an aftermarket replacement component, not an OEM part.
- Professional installation is highly recommended for optimal safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for demanding real-world conditions.
- Fast Global Fulfillment — We offer free standard delivery to most regions with an average transit time of 5–15 days.
- Manufacturer-Direct Value — By working directly with our manufacturing partners, we provide fair pricing without compromising on materials or quality control.
Payment & Security
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