Skeg Guard – Fits MerCruiser Alpha One Gen II (Replaces MerCruiser 27031, 1901)

$80.00

Shipping calculated at checkout.

Skeg Guard – Fits MerCruiser Alpha One Gen II (Replaces MerCruiser 27031, 1901) is backordered and will ship as soon as it is back in stock.

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

Free standard shipping on all orders under 1 KG

If you have any questions, feel free to email us at info@sierramarines.com, and we’ll get back to you within 20–36 hours.

Product Details

This Stainless Steel Skeg Guard protects your sterndrive from damage or can be used to repair an already broken skeg. It is specifically designed to fit MerCruiser Alpha One Generation 2 stern drives from 1991 to the present.

It serves as a direct replacement for MerCruiser parts 27031 and 1901, as well as aftermarket references Panther 35-SS610, Yoursme 27031, and SeaSierra 35-SS610.

Installs in approximately 10 minutes with included hardware (drilling required).
Constructed from mirror-polished 316 marine-grade stainless steel for superior corrosion resistance.
Features a bottom drain hole to prevent water buildup, corrosion, and freezing.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand	Part Number
MerCruiser	27031
MerCruiser	1901
Panther	35-SS610
Yoursme	27031
SeaSierra	35-SS610

Engine & Model Compatibility

Confirm your engine model/year in the table below.

This component is compatible with MerCruiser sterndrives as detailed in the following chart.

Brand	Model	Rated HP	Years	OEM Part No.	Notes
MerCruiser	Alpha One Gen II	Up to 300 HP	1991–Present	27031, 1901	Can be used for new skeg protection or repair of damaged skeg

Technical Specs

Product Type: Skeg Guard/Protector
Installation: Screw-in (drilling required)
Material: 316 Marine Grade Stainless Steel
Finish: Mirror-polished
Thickness: 1.5mm (0.059 in) / 3mm (0.118 in) at lower wear tab
Design Features: Drain hole at bottom to prevent corrosion and freezing
Installation Time: Approximately 10 minutes
Required Remaining Skeg: Minimum 2-3 inches
Package Contents: Mounting hardware, instructions, hex/Allen wrench, Loctite 262
Warranty: 12 months (Yoursme brand)

What’s in the Box

1 x Skeg Cover Guard
1 x Drill bit
2 x Nuts
4 x Screws
1 x Allen wrench
1 x Loctite 262 (Panther brand only)

Installation Notes

Put on gloves to ensure safety.
Ensure the keel guard model matches the skeg plate on your engine model.
Flatten any spikes or jagged edges on the keel guard to allow an easy fit over the tail fin.
Tap gently with a rubber mallet until the fit is perfect.
Using the pre-drilled mounting holes in the guard as a template, drill holes into your skeg with a 1/4-inch drill bit and install the hardware using the provided hex wrench.

Troubleshooting & FAQ

Will this skeg guard fit my specific engine?

This skeg guard is designed for MerCruiser Alpha One Generation II stern drives manufactured from 1991 to the present. Please verify your drive model and year before purchasing.

How much of my original skeg needs to be left for this to install?

You need a minimum of 2 to 3 inches of your original skeg remaining for a secure and proper installation.

Do I have to drill holes in my skeg?

Yes, installation requires drilling. The guard has pre-drilled mounting holes to use as a template. All necessary mounting hardware, including a drill bit, is included in the kit.

What is the purpose of the drain hole at the bottom?

The drain hole is a key design feature that allows water to escape, preventing it from getting trapped between the guard and the skeg. This helps to stop corrosion and protects against damage from freezing water in colder climates.

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 part 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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