Skeg Protector Guard – Fits MerCruiser Alpha 1 (Replaces 27021)
Skeg Protector Guard – Fits MerCruiser Alpha 1 (Replaces 27021) 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 Protector Guard – Fits MerCruiser Alpha 1 (Replaces 27021)
Product Details
This Skeg Protector Guard for MerCruiser Alpha 1 (1985-1990) provides robust protection against impact and corrosion for your sterndrive skeg. Designed specifically for MerCruiser Alpha 1 models from 1985 to 1990, it is constructed from high-quality stainless steel to withstand harsh marine environments and prevent costly repairs.
It serves as a direct replacement for several part numbers, including SupremeMarine 1907, Panther Safe Skeg 35-SS605, and MerCruiser 27021.
- Features a simple bolt-on installation with included hardware.
- Crafted from polished, marine-grade 316 stainless steel for superior durability.
- A thickened 3mm lower wear tab reduces damage from ramp dragging.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| SupremeMarine | 1907 |
| Panther Safe Skeg | 35-SS605 |
| MerCruiser | 27021 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Years | OEM Part No. | Notes |
|---|---|---|---|---|
| MerCruiser | Alpha 1 Stern Drive | 1985–1990 | 27021 | For serial numbers 6854393-0D594568 |
Technical Specs
- Product Type
- Skeg Protector Guard
- Installation
- Bolt-On
- Material
- Marine Grade 316 Stainless Steel, 18-Gauge
- Finish
- Mirror Polished
- Wear Tab Thickness
- 3 mm
- Color
- Silver
- Auto Part Position
- Rear Lower
- OEM Number
- 27021
- Package Dimensions
- 31.3 × 16.5 × 3.3 cm (12.32 × 6.5 × 1.3 inches)
- Weight
- 608 g (1.34 pounds)
- Warranty
- Amazon.com Voluntary 30-Day Return Guarantee
What’s in the Box
- 1 x Skeg Protector Guard (27021)
- 2 x Stainless Steel Mounting Bolts (with thread locker sealant pre-applied)
- 1 x Hex Key Tool
Installation Notes
- Slide the skeg guard onto the lower unit skeg, ensuring a snug fit.
- Use the pre-drilled mounting holes in the guard as a template to drill two 1/4" holes through the skeg.
- Insert the provided stainless steel bolts from each side and tighten securely using the included hex key. The bolts feature a pre-applied thread locker to prevent loosening from vibration.
Troubleshooting & FAQ
How do I know if this skeg guard will fit my engine?
This guard is specifically designed for MerCruiser Alpha 1 stern drives manufactured between 1985 and 1990, covering serial numbers from 6854393 to 0D594568. Always check your engine's model, year, and serial number range against the compatibility table before purchasing.
Do I need special tools for installation?
You will need a power drill with a 1/4" drill bit. The kit includes the two stainless steel mounting bolts and a hex key required to secure them.
What is the purpose of the drain hole?
The drain hole at the bottom of the guard allows water to escape, preventing it from getting trapped. This helps prevent corrosion and protects the skeg from damage caused by freezing water in colder climates.
How does this aftermarket part compare to the OEM version?
This guard is engineered to meet or exceed original equipment specifications. It is constructed from heavy-duty 18-gauge 316 marine-grade stainless steel for longevity and a precise fit, offering a high-quality alternative to the OEM component.
What are signs my skeg needs protection?
Visible damage such as cracks, chips, significant abrasions from ramp dragging, or bent sections are clear indicators. A damaged skeg can negatively affect your boat's handling and performance. This guard can conceal existing damage and prevent further harm.
How often should I inspect the skeg protector?
We recommend checking the skeg guard during regular pre-launch inspections and as part of your annual maintenance routine. Ensure the mounting bolts remain tight and the guard is free of significant damage.
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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