00222A for Gear Housing Anode — Replaces Mercury 42121Q02
00222A for Gear Housing Anode — Replaces Mercury 42121Q02
00222A for Gear Housing Anode — Replaces Mercury 42121Q02
Infographic highlighting the superiority of aluminum anodes with benefits listed.
Comparison chart between Aluminum and Zinc for water types and properties
Diagram explaining how anodes work to prevent galvanic corrosion damage on boats.

00222A for Gear Housing Anode — Replaces Mercury 42121Q02

Regular price $8.65 Sale

Protect your Mercury, Mariner, or Force outboard with a precision-fit aluminum gear housing anode 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 for a full replacement:

● 00222A — Qty 1 (Replaces Mercury 42121Q02)


Key Benefits

● Aluminum gear housing anode for lower unit corrosion protection

● OEM-equivalent replacement for Mercury part #42121Q02

● Aluminum alloy approved for use in all water types

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

● Patented red spot wear indicator for easy visual inspection

● Meets Mercury factory requirements — won’t invalidate warranty

● Longer-lasting and more effective than traditional zinc anodes


Compatibility

Fits Force Standard Gearcase Models:

● 9.9 hp and 15 hp 2-cycle (1998 model year)

Fits Mercury/Mariner Standard Gearcase Models:

● 6 hp, 8 hp, and 9.9 hp 2-cycle (1986 and newer)

● F8 and F9.9 FourStroke (1995–2004)

● F13.5 FourStroke (2001 and newer)

● F15 FourStroke (1998–2006)

● XR10

● Marathon 10

● SeaPro 10

● Viking

Replaces OEM:

● Mercury 42121Q02


Why Aluminum Anodes?

Mercury and Mariner outboards 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 and protect your outboard. Using zinc anodes on Mercury applications 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

● Wear Indicator: Patented red spot system

● Total Weight: 0.03 lbs (0.01 kg)


What’s Included

● Aluminum gear housing anode


Ideal For

● Mercury, Mariner, and Force outboard owners

● Routine corrosion prevention and maintenance

● Mixed-water boating environments

● DIY replacement or professional service