Aluminum Trim Tab Anode for Yamaha Outboards – Fits L150, F150, FL150, L200 and 150–200 HP (Replaces 6K1-45371-01, 6K1-45371-02)

Product Details

This Aluminum Trim Tab Anode is a sacrificial corrosion-protection component for specified Yamaha outboard applications. It helps protect the outboard's submerged metal components by gradually sacrificing itself in the presence of electrical corrosion activity, particularly in saltwater and brackish-water environments.

The anode is listed for Yamaha applications including L150, F150, FL150, L200, and related 150–200 HP outboards. Always compare the original anode's shape, mounting pattern, and part number before installation because fitment can vary by exact engine model and lower-unit configuration.

This aftermarket replacement is associated with Yamaha OEM references 6K1-45371-01, 6K1-45371-02, and 6J9-45371-02. Sierra reference 18-6121A is also listed as an interchange reference for the Yamaha 6K1-45371-02 application.

• Sacrificial aluminum anode for Yamaha outboard applications
• Trim tab mounting position
• Designed to help reduce galvanic corrosion of submerged metal components
• Suitable for saltwater and brackish-water service when matched to the correct engine application

Part Number Matrix

Use the following references to compare the replacement with your existing anode and engine documentation.

Engine & Model Compatibility

The supplier's application data lists this anode for the Yamaha applications below. Verify the exact model designation and existing anode before ordering.

Technical Specs

Material

Aluminum

Configuration

Trim tab anode

Application

Yamaha outboard corrosion protection

Mounting Position

Trim tab location

Recommended Environment

Saltwater and brackish-water applications, subject to correct engine fitment

What's in the Box

• 1x Aluminum trim tab anode

Installation Notes

1. Confirm that the replacement matches the original anode's profile, mounting holes, and applicable part number.
2. Remove the old anode using suitable tools and inspect the mounting area for corrosion, damage, paint, or debris.
3. Clean the contact surface so the anode can maintain direct electrical contact with the mounting surface.
4. Position the new anode and align the mounting holes without forcing or modifying the part.
5. Install the original or approved fasteners and tighten them according to the engine manufacturer's specifications.
6. Do not paint over the anode or its contact surface. Recheck the installation after launching the boat.

Troubleshooting & FAQ

How do I confirm that this anode fits my Yamaha outboard?

Compare your engine's exact model designation and the original anode with the listed Yamaha applications and references, including 6K1-45371-01, 6K1-45371-02, and 6J9-45371-02. The mounting shape and hole pattern must also match. Do not rely on horsepower alone.

Is this an aluminum or zinc anode?

This product is an aluminum anode. The material should be selected according to the operating environment and the engine manufacturer's recommendation. Do not substitute materials without confirming that the replacement is appropriate for your application.

Why is the anode designed to corrode?

An anode is intended to sacrifice material during galvanic corrosion protection. Its gradual erosion helps protect more valuable submerged metal components. The rate of erosion depends on water chemistry, electrical conditions, boat use, and nearby metals.

How often should I inspect or replace the anode?

Inspect the anode regularly, especially when operating in saltwater or brackish water. Replace it when substantial material has been lost, the mounting area is no longer protected, or the engine manufacturer specifies replacement.

What if the anode is not corroding?

Check for paint, oxidation, debris, loose fasteners, or poor metal-to-metal contact between the anode and the mounting surface. Also consider the water environment and electrical bonding of the boat. Consult a qualified marine technician if the anode remains inactive or erosion is abnormal.

Does this fit every Yamaha 150–200 HP outboard?

No. The listed horsepower range is an application guide, not a guarantee for every model. Yamaha model families, lower units, and mounting configurations can differ. Verify the exact model and the original anode before purchase.

Safety & Important Info

• Verify the engine model, original part, mounting pattern, and application references before ordering.
• This is an aftermarket replacement and is not an OEM component.
• Do not use the old 225 HP, 1986-and-up, universal 2-stroke/4-stroke, or counter-rotation-only claims as standalone fitment criteria.
• Professional installation is recommended when the mounting area is damaged or heavily corroded.