Skeg Guard Protector – Fits MerCruiser Alpha 1 (1985–1990) (Replaces 27021, 1907)
Skeg Guard Protector – Fits MerCruiser Alpha 1 (1985–1990) (Replaces 27021, 1907) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Skeg Guard Protector – Fits MerCruiser Alpha 1 (1985–1990) (Replace...
Product Details
This Skeg Guard Protector – Fits MerCruiser Alpha 1 Drive 1985–1990 is engineered to repair and shield damaged skegs, preventing costly lower unit repairs. Designed for MerCruiser Alpha 1 stern drives from 1985–1990, it’s a durable solution for maintaining your drive's performance.
It serves as a direct replacement for MerCruiser 27021/1907, Panther Safe-Skeg 35-SS605, and Sierra 35-SS605.
- Installs easily with a bolt-on design; all mounting hardware is included.
- Constructed from 316 marine-grade stainless steel for superior corrosion resistance.
- Features a built-in drain hole to prevent water buildup and freeze-up.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| MerCruiser | 27021 |
| MerCruiser | 1907 |
| Panther Safe-Skeg | 35-SS605 |
| Sierra | 35-SS605 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For MerCruiser Engines: This part is compatible with specific Alpha 1 stern drives. Please verify your model and production year range.
| Brand | Model | Years | OEM Part No. | Notes |
|---|---|---|---|---|
| MerCruiser | Alpha 1 stern drives | 1985–1990 | 27021/1907 | Can be installed on skegs with as little as 2-3 inches remaining |
Technical Specs
- Product Type
- Skeg Guard/Protector
- Installation
- Bolt-on with included hardware
- Material
- 316 Marine-grade stainless steel
- Thickness
- 1.5 mm (50% thicker than competing products)
- Color
- Polished stainless steel (silver)
- Features
- Drain hole to prevent corrosion and freeze-up
- Weight
- 1.8 pounds (0.82 kg)
- Compatibility
- MerCruiser Alpha 1 drives 1985-1990
- Application
- New skeg protection or damaged skeg repair
- Mounting Type
- Bolt-on with included screws
What’s in the Box
- 1 x Skeg Guard/Protector
- 1 x Drill bit
- 2 x Nuts
- 2 x Hex wrenches
- 4 x Screws
- 1 x Loctite 262 (adhesive)
Installation Notes
- Position the skeg protector securely over the existing skeg.
- Use the included drill bit to create holes through the skeg at the pre-drilled locations on the protector.
- Apply the included Loctite to the screws, insert them, and tighten firmly with the nuts and hex wrenches to complete the installation.
Troubleshooting & FAQ
Will this fit my skeg if it's already damaged?
Yes, this skeg guard is designed for both protection and repair. It can be successfully installed on skegs that have been broken, with as little as 2-3 inches of the original skeg remaining.
How does this skeg guard attach?
Installation is a straightforward bolt-on process. The kit includes all necessary hardware: a drill bit, screws, nuts, hex wrenches, and Loctite adhesive. You simply drill through your existing skeg using the guard as a template and secure it with the provided fasteners.
What makes this skeg guard more durable than others?
This protector is constructed from high-strength 316 marine-grade stainless steel and has a thickness of 1.5 mm, making it approximately 50% thicker than many competing products for enhanced impact resistance.
What is the purpose of the drain hole?
The integrated drain hole allows water to escape freely. This design feature prevents water from getting trapped inside the protector, which helps prevent corrosion and damage from freezing in cold climates.
Do I need to be an expert to install this?
The installation is designed to be simple enough for most boat owners to perform themselves with basic tools. However, for maximum safety and performance, professional installation is always recommended.
What are the signs that I need to replace my skeg or install a guard?
Visible damage such as cracks, chips, or a bent skeg are clear indicators. Performance issues like poor steering control or increased vibration can also signal a damaged skeg that needs repair or protection.
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
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