Stainless Steel Skeg Guard for MerCruiser Alpha One Gen II, 1991–Present — Replaces 27031 and 35-SS610
Stainless Steel Skeg Guard for MerCruiser Alpha One Gen II, 1991–Present — Replaces 27031 and 35-SS610 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.
Stainless Steel Skeg Guard for MerCruiser Alpha One Gen II, 1991–Pr...
Stainless Steel Skeg Guard for MerCruiser Alpha One Gen II, 1991–Present — Replaces 27031 and 35-SS610 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 stern drives is designed to help protect the lower-unit skeg from impact damage and wear. It is listed for Alpha One Gen II applications from 1991 to the present.
This aftermarket replacement is identified as a replacement for MerCruiser 27031 and 35-SS610. It installs over the existing skeg and is intended to protect the original skeg rather than replace the complete lower-unit assembly.
- Bolt-on installation with the listed mounting hardware.
- Reinforced 3 mm lower wear tab for added protection in the area most exposed to underwater impacts.
- Drain hole helps prevent water from collecting inside the guard, reducing the risk of corrosion and freeze-related damage.
- Mirror-polished stainless steel finish for durability in a marine environment.
Part Number Matrix
Use the following references to compare the replacement part with the number on your existing guard or service documentation.
| Brand or Reference | Part Number |
|---|---|
| MerCruiser | 27031 |
| Replacement reference | 35-SS610 |
Engine & Model Compatibility
Confirm the stern-drive generation and the reference number before ordering. Model, year, and application conditions should be checked together.
| Brand | Model | Years | Reference Part No. | Notes |
|---|---|---|---|---|
| MerCruiser | Alpha One Generation II | 1991–Present | 27031 | Verify the original guard and stern-drive configuration before installation. |
Technical Specs
- Product Type
- Skeg guard protector
- Installation
- Bolt-on installation over the existing skeg
- Housing Material
- Marine-grade 316 stainless steel
- Housing Color
- Silver / polished stainless steel
- Dimensions
- Length: approximately 25 cm (9.84 in); width: approximately 11 cm (4.33 in); height: approximately 14 cm (5.51 in)
- Weight
- Approximately 0.6 kg (1.32 lb)
- Fitting Type
- Self-locking mounting hardware
- Thread Size
- 1/4 in
- Wear Protection
- Reinforced 3 mm lower wear tab
- Drainage
- Integrated drain hole to help prevent water collection
What’s in the Box
- 1 x Stainless steel skeg guard
- 1 x 1/4 in drill bit
- 2 x Nuts
- 2 x Hex wrenches
- 4 x Self-locking stainless steel screws
Installation Notes
- Clean the existing skeg and remove debris or marine growth. Place the guard over the skeg to confirm alignment and fit.
- Mark the locations for the two mounting holes.
- Carefully drill through the skeg using the included 1/4 in drill bit.
- Apply a suitable marine-grade sealant to the holes and mounting hardware to help prevent water intrusion.
- Secure the guard with the supplied screws and nuts. Tighten evenly until snug; do not overtighten.
- Before returning the boat to service, confirm that the guard is secure and does not interfere with the propeller or other lower-unit components.
Troubleshooting & FAQ
Will this fit my specific engine model?
This guard is listed for MerCruiser Alpha One Generation II stern drives from 1991 to the present. Confirm that your original part or service documentation references 27031 or 35-SS610, and verify the physical shape of the existing skeg before ordering.
Does this replace the entire skeg or cover it?
This is a skeg guard. It installs over the existing skeg to protect it or cover minor existing damage; it does not replace the complete skeg or lower-unit assembly.
What is the purpose of the reinforced wear tab?
The reinforced 3 mm lower wear tab adds material at the bottom of the guard, where contact with underwater debris, rocks, or the bottom can cause damage.
Is this an OEM component?
No. This is an aftermarket replacement part intended for the listed MerCruiser Alpha One Generation II application.
How should I confirm compatibility?
Check the stern-drive generation, model year, original part reference, and the shape of the existing skeg together. Do not rely on the engine brand alone, because different stern-drive generations may use different guards.
What installation tools are included?
The package includes a 1/4 in drill bit and two hex wrenches, along with the listed screws and nuts. Basic cleaning, marking, sealing, and drilling equipment may also be required.
Safety & Important Info
- Verify the stern-drive model, year, original part reference, and physical fit before purchase.
- Inspect the existing skeg for structural damage. A guard is not a substitute for repairing or replacing a severely damaged lower unit.
- Use appropriate eye protection and safe drilling practices during installation.
- Confirm that all fasteners are secure and that there is no interference with the propeller or other moving components before use.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended when the skeg or lower unit has significant damage.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts selected for demanding real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions; available delivery options and transit estimates are shown at checkout.
- Manufacturer-Direct Value — Fair pricing with attention to materials and quality control.
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.
