Marine Whale Tail Hydrofoil Stabilizer for 40–300 HP Outboard Motors – Replacement Reference FO2003
Marine Whale Tail Hydrofoil Stabilizer for 40–300 HP Outboard Motors – Replacement Reference FO2003 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.
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Marine Whale Tail Hydrofoil Stabilizer for 40–300 HP Outboard Motor...
Marine Whale Tail Hydrofoil Stabilizer for 40–300 HP Outboard Motors – Replacement Reference FO2003 is backordered and will ship as soon as it is back in stock.
Product Details
This Marine Whale Tail Hydrofoil Stabilizer is designed for many outboard motor applications in the 40–300 HP range. By adding stabilizing lift at the stern, it can help improve low-speed handling, reduce time to plane, and provide a smoother ride. Confirm the engine configuration and exclusions below before installation.
This aftermarket stabilizer is sold as a replacement for the FO2003 reference number. It is not an OEM component.
- Mounts directly to the motor’s anti-cavitation plate and requires drilling.
- Constructed from reinforced Nylon PA66 marine-grade plastic.
- Includes stainless-steel mounting hardware, a drill bit, and installation instructions.
Reference Number
Use the following aftermarket reference to compare the replacement part with your existing component:
| Reference Type | Number |
|---|---|
| Replacement reference | FO2003 |
Engine & Model Compatibility
This hydrofoil is listed for many outboard motors from 40–300 HP, covering both 2-stroke and 4-stroke applications where the anti-cavitation plate can accept this drilled mounting pattern. Model, year, horsepower, stroke, exhaust routing, anode configuration, and plate clearance must be checked together.
| Brand | Model | Rated HP | Stroke | Years | Reference | Notes |
|---|---|---|---|---|---|---|
| Mercury | Various | 40–300 HP | 2-Stroke & 4-Stroke | Various | FO2003 | Excludes Mercury 4-stroke 40, 50, and 60 HP applications. |
| Yamaha | Various | 40–300 HP | 2-Stroke & 4-Stroke | Various | FO2003 | Excludes 350 HP models. |
| Johnson | Various | 40–300 HP | 2-Stroke & 4-Stroke | Various | FO2003 | Verify the mounting plate and clearance before purchase. |
| Evinrude | Various | 40–300 HP | 2-Stroke & 4-Stroke | Various | FO2003 | Verify the mounting plate and clearance before purchase. |
| Honda | Various | 40–300 HP | 2-Stroke & 4-Stroke | Various | FO2003 | Excludes 200 HP and higher applications. |
| Suzuki | Various | 40–300 HP | 2-Stroke & 4-Stroke | Various | FO2003 | Verify the mounting plate and clearance before purchase. |
| Tohatsu | Various | 40–300 HP | 2-Stroke & 4-Stroke | Various | FO2003 | Verify the mounting plate and clearance before purchase. |
Known Incompatible Applications
| Brand | Model | Rated HP | Stroke | Years | Reason |
|---|---|---|---|---|---|
| Mercury | Various | 40, 50, 60 HP | 4-Stroke | Various | Not compatible. |
| Mercury | Bravo II | Various | Various | Various | Not compatible where exhaust passes through the cavitation plate. |
| Mercury | Bravo III | Various | Various | Various | Not compatible with the rare configuration having only one anode on the bottom of the cavitation plate. |
| Yamaha | Various | 350 HP | 4-Stroke | Various | Not compatible. |
| Honda | Various | 200 HP and higher | 4-Stroke | Various | Not compatible. |
| Volvo | Various | Various | Various | Various | Not compatible where exhaust passes through the cavitation plate. |
Technical Specifications
- Product Type
- Marine hydrofoil stabilizer
- Application
- Many 40–300 HP outboard motor applications
- Installation
- Anti-cavitation plate mount; drilling required
- Mounting
- Four mounting bolts with included hardware
- Material
- Reinforced Nylon PA66 marine-grade plastic
- Color
- Blue
- Package Dimensions
- 17.5 × 15 × 3 inches
- Weight
- 1.72 kg (3.79 lbs)
- Hardware
- Stainless-steel mounting hardware included
- Surface Design
- Crescent-shaped channels direct water flow to support lift and stability.
What’s in the Box
- 1 × Blue hydrofoil stabilizer
- 1 × Set of stainless-steel screws and nuts
- 1 × 6.5 mm drill bit
- 1 × Installation instruction sheet
Installation Notes
- Center the hydrofoil on the motor’s anti-cavitation plate and confirm that it will not interfere with the propeller, steering, exhaust flow, or anodes.
- Mark the four mounting-hole positions through the hydrofoil onto the plate.
- Remove the hydrofoil and carefully drill the marked holes with the included 6.5 mm drill bit.
- Place the hydrofoil back on the plate and align the holes.
- Insert the stainless-steel bolts from the top and secure them with the nuts from below.
- Tighten all four fasteners evenly and check the installation before operating the boat.
Troubleshooting & FAQ
How do I know if this hydrofoil will fit my motor?
Check the complete engine configuration, including brand, model, year, horsepower, stroke, exhaust routing, anode arrangement, anti-cavitation plate shape, and available clearance. Compare those details with the compatibility and exclusion tables before ordering.
Is drilling required for installation?
Yes. Installation requires four holes to be drilled in the motor’s anti-cavitation plate. The package includes a 6.5 mm drill bit and stainless-steel mounting hardware.
What benefits can I expect after installation?
The hydrofoil is designed to add stabilizing lift and may help the boat get on plane sooner, improve low-speed handling, and reduce porpoising. Results vary with the boat, motor, load, trim, and operating conditions.
Will this stop my boat from porpoising?
It may reduce porpoising by providing additional stabilizing lift at the stern, but no hydrofoil can guarantee the same result for every boat or setup.
Will this fit a Mercury 60 HP 4-stroke motor?
No. The listed compatibility exclusions include Mercury 4-stroke motors rated at 40, 50, and 60 HP.
Is this an OEM part?
No. This is an aftermarket replacement for the FO2003 reference. Confirm dimensions, mounting-hole requirements, and engine exclusions before installation.
Does the package include mounting hardware?
Yes. The package includes the hydrofoil, stainless-steel screws and nuts, a 6.5 mm drill bit, and installation instructions.
What warranty and return coverage applies?
Warranty and return coverage are subject to the current store policy. Review the applicable policy before purchase and contact support if you need assistance.
Safety & Important Information
- Verify the engine configuration, dimensions, clearance, and mounting requirements before purchase.
- Do not install the hydrofoil if it interferes with the propeller, steering, exhaust, anodes, or other controls.
- Drilling and installation should be performed by a qualified person familiar with marine equipment.
- This is an aftermarket replacement, not an OEM component.
- Inspect all fasteners after installation and before operating the boat.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts designed for demanding real-world conditions.
- Fast Global Fulfillment — Standard delivery options are available to most regions; timing varies by destination.
- Manufacturer-Direct Value — Fair pricing with attention to materials and quality control.
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