Skeg Guard – Fits MerCruiser Alpha One Generation II (Replaces MerCruiser 27031)
Skeg Guard – Fits MerCruiser Alpha One Generation II (Replaces MerCruiser 27031) is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
If the return is due to our error or a defective item, we’ll make it right.
Please contact us before returning any item.
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.
Skeg Guard – Fits MerCruiser Alpha One Generation II (Replaces MerC...
Skeg Guard – Fits MerCruiser Alpha One Generation II (Replaces MerCruiser 27031) is backordered and will ship as soon as it is back in stock.
Product Details
This marine-grade 316 stainless steel Skeg Guard for MerCruiser Alpha One Generation II (1991–Present) is designed to protect the lower unit skeg from damage. It fits MerCruiser Alpha One Generation II stern drives from 1991 to the present.
This part is a direct replacement for MerCruiser 27031 and serves as an interchange for SupremeMarine 1901, Quickmarine 27031, Sevencow 27031-TP1, and Yoursme 27031.
- Simple bolt-on installation with all necessary hardware included.
- Features a reinforced 3mm lower wear tab for enhanced durability against underwater impacts.
- Includes a drain hole to prevent water collection, corrosion, and damage from freezing.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| MerCruiser | 27031 |
| SupremeMarine | 1901 |
| Quickmarine | 27031 |
| Sevencow | 27031-TP1 |
| Yoursme | 27031 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Years | OEM Part No. | Notes |
|---|---|---|---|---|
| MerCruiser | Alpha One Generation II | 1991–Present | 27031 | Standard and counter rotation applications |
Technical Specs
- Product Type
- Skeg Guard Protector
- Installation
- Bolt-on with included hardware
- Housing Material
- Marine-Grade 316 Stainless Steel
- Housing Color
- Silver/Polished Stainless
- Dimensions
- Length: ~25 cm (~9.84"), Width: ~11 cm (~4.33"), Height: ~14 cm (~5.51")
- Weight
- ~0.6 kg (~1.32 lbs)
- Fitting Type
- Self-locking hardware
- Thread Size
- 1/4"
- Warranty
- 1 Year (varies by manufacturer)
- Other Technical Attributes
- Mirror polished finish; 3mm lower wear tab; includes drain hole to prevent water collection and freezing
What’s in the Box
- 1 x Skeg Guard (27031)
- 1 x 1/4" Drill Bit
- 2 x Nuts
- 2 x Hex Wrenches
- 4 x Screws (Self-locking Stainless Steel)
Installation Notes
- Clean the skeg of any debris or marine growth. Place the new skeg guard over the existing skeg to ensure a proper fit.
- Mark the locations for the two mounting holes.
- Carefully drill through the skeg using the included 1/4" drill bit.
- Apply a marine-grade sealant to the holes and mounting hardware to prevent water intrusion.
- Secure the skeg guard using the provided self-locking screws and nuts. Tighten them evenly until snug, but do not overtighten.
Troubleshooting & FAQ
Will this fit my specific engine model?
This skeg guard is specifically designed for MerCruiser Alpha One Generation II stern drives from 1991 to the present. To guarantee fitment, confirm your original part number is 27031 or one of the listed cross-references.
Does this replace the entire skeg or cover it?
This is a skeg guard, designed to install over your existing skeg to protect it or cover minor existing damage. It does not replace the entire skeg.
What is the purpose of the reinforced wear tab?
The 3mm reinforced lower wear tab provides extra material at the bottom of the skeg guard, which is the area most susceptible to damage from groundings, rocks, and underwater debris. This feature significantly extends the life of the guard and protects your lower unit.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It's built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, it is batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
This product is 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 and specifications against 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
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
