00050A for Mercruiser Alpha 1 Gimbal Housing Bolt Headnut Anodes — Replaces Mercury 55989Q9

Protect your Mercruiser Alpha 1 outdrive with precision-fit aluminum headnut anodes engineered to meet OEM requirements and deliver reliable corrosion protection in salt, brackish, or fresh water. Made in the USA for consistent performance and durability.

Contents

This product includes all required aluminum anodes and components for a full replacement:

● 00050A — Qty 2 headnut anodes (Replaces 55989Q9)

Key Benefits

● Aluminum anodes for gimbal housing bolt head corrosion protection

● OEM-equivalent replacement for Mercury part #55989Q9

● Aluminum alloy approved for use in all water types

● Manufactured in the USA to MIL-DTL-24779 military specification

● Meets Mercury factory requirements — won’t invalidate warranty

● Longer-lasting and more effective than traditional zinc anodes

Compatibility

Fits:

● Mercruiser Alpha 1 outdrives

Replaces OEM:

● Mercury 55989Q9

Why Aluminum Anodes?

Mercury and Mercruiser outdrives are factory-equipped with aluminum anodes because they provide reliable protection across salt, brackish, and freshwater environments. Unlike zinc, which can become inactive in freshwater, aluminum continues to perform. Using zinc anodes on Mercury or Mercruiser drives may also void your manufacturer warranty, making aluminum the correct and compliant choice.

Product Specifications

● Material: Navalloy® Aluminum Alloy

● Water Type: Salt, Brackish, Fresh

● Manufacturing Standard: MIL-DTL-24779

● Total Weight: 0.15 lbs (0.07 kg)

What’s Included

● (2) Aluminum headnut anodes

● Neoprene washers

Ideal For

● Mercruiser Alpha 1 outdrive owners

● Routine corrosion prevention and maintenance

● Mixed-water boating environments

● DIY replacement or professional service