Skeg Protector Guard for MerCruiser Alpha 1 (1985-1990) – Fits MerCruiser Stern Drive (Replaces 27021)

Skeg Protector Guard for MerCruiser Alpha 1 (1985-1990)

This skeg protector guard is engineered for MerCruiser Alpha 1 stern drives from 1985 to 1990. Constructed from high-strength stainless steel, it offers robust protection for your skeg against impact damage, corrosion, and harsh marine conditions.

This component is a direct replacement for SupremeMarine 1907, Panther Safe Skeg 35-SS605, and MerCruiser 27021.

• Bolt-On Installation: Includes pre-drilled mounting holes and all necessary hardware for a secure fit.
• Durable Construction: Made from marine-grade 316 stainless steel with a mirror-polished finish.
• Enhanced Protection: Features a thickened 3mm lower wear tab to protect against ramp dragging and a drain hole to prevent water buildup.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 1 x Skeg Protector Guard (27021)
• 2 x Stainless Steel Mounting Bolts (with thread locker sealant pre-applied)
• 1 x Hex Key Tool

Installation Guide

1. Place the skeg guard over your existing skeg to confirm fitment. The guard is designed with pre-drilled mounting holes for guidance.
2. Using the pre-drilled holes on the guard as a template, drill 1/4" holes through your skeg.
3. Install the included stainless steel mounting bolts through the guard and the newly drilled holes.
4. The bolts come with thread locker sealant pre-applied to prevent them from loosening due to vibration. Tighten securely using the included hex key.
5. Ensure the drain hole on the bottom of the guard is clear to prevent corrosion or damage from freezing.

Troubleshooting & FAQ

Q: How do I confirm this will fit my specific MerCruiser drive?
A: This skeg guard is designed for MerCruiser Alpha 1 stern drives manufactured between 1985 and 1990. Critically, you must verify that your drive's serial number falls within the range of 6854393 to 0D594568. Check the compatible models table and your drive's serial number plate before ordering.

Q: What is the purpose of the thickened lower tab?
A: The 3mm thickened wear tab on the bottom of the guard provides an extra layer of material to absorb abrasion. This helps protect your skeg from damage when dragging on a boat ramp or running in shallow water.

Q: Does this replace my entire skeg?
A: No, this is a protective guard that fits over your existing skeg. If your skeg is severely damaged or broken off, you may need a more comprehensive repair or replacement.

Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.