SouthMarine Trim Tab Skeg Anode for Yamaha 115–200HP — Zinc Direct-Fit Replacement (6J9-45371-00)

SouthMarine's trim tab skeg anode 6J9-45371-00 protects Yamaha 115–200HP outboards from galvanic corrosion while restoring sacrificial zinc protection to the lower unit.

Designed as a direct-fit replacement for worn sacrificial anodes, this zinc alloy trim tab/skeg anode suits a wide range of Yamaha outboards (115HP, 150HP, 175HP, 200HP). It replaces OEM numbers 6J9-45371-00, 6J9-45371-01 and 6K1-45371-02 and bolts onto the lower unit to intercept electrochemical deterioration before it reaches expensive components. Whether you’re maintaining a workboat or prepping a weekend cruiser, installing a fresh anode is an essential, low-cost step to extend the life of your propulsion gear.

How does this anode protect my Yamaha outboard?

The SouthMarine zinc tab functions as a sacrificial anode — it corrodes preferentially and thereby protects steel and aluminum parts of the lower unit from galvanic attack. Properly installed, it channels corrosive current to the zinc piece rather than to vital components.

• Made from zinc alloy formulated for marine use.
• Positions on the trim tab/skeg to intercept stray currents.
• Replaces worn OEM anodes using the same mounting points.

Will this fit my engine and replace the OEM part?

Yes — this trim tab skeg anode is compatible with Yamaha 115HP, 150HP, 175HP and 200HP outboards and is a direct replacement for OEM part numbers 6J9-45371-00, 6J9-45371-01 and 6K1-45371-02. Confirm fitment by comparing your old anode or supplying your engine serial number if unsure.

• Fits the lower unit trim tab/skeg mounting design on listed Yamaha models.
• Direct-fit bolt locations match OEM for straightforward installation.
• Contact seller with engine serial for verification when in doubt.

How do I install and maintain the trim tab skeg anode?

Installation is typically a simple bolt-on job: remove the old anode, clean the mounting surface, and secure the new SouthMarine anode with the original hardware or replacement fasteners as needed. Periodic inspection is recommended; replace when more than 50% consumed or showing pitting.

• Tools required: basic hand tools to remove and tighten mounting bolt(s).
• Maintenance: inspect annually or after prolonged saltwater use.
• Replace when zinc shows heavy erosion or loss of mass.

What is this anode made of and why that material?

The part is cast from a zinc alloy chosen for its electrochemical properties in saltwater environments and compatibility with common outboard metals. Zinc is widely used in temperate and mixed-salinity waters to provide reliable sacrificial protection.

• Zinc alloy composition tailored for predictable galvanic action.
• Durable casting resists mechanical damage while sacrificing to corrosion.
• Cost-effective and readily available for routine replacement cycles.

Who this is for: boat owners, fleet managers and marine technicians who operate Yamaha 115–200HP outboards and want a reliable, OEM-compatible sacrificial anode to limit galvanic deterioration. Choose this SouthMarine trim tab skeg anode if you need a direct-fit zinc replacement to maintain lower-unit integrity, keep maintenance costs down, and simplify seasonal upkeep.