Yamaha/Selva Outboard Anode – Fits 25HP, 50HP, 55HP, 75HP, 80HP, 85HP and 90HP (Replaces 6H1-45251-02, 6H1-45251-03)

Product Details

This replacement outboard anode is designed for selected Yamaha and Selva outboard applications. As a sacrificial anode, it gradually corrodes in place of protected metal components, helping reduce galvanic corrosion in the underwater drive and mounting area.

This single anode replaces Yamaha OEM references 6H1-45251-02 and 6H1-45251-03. Sierra reference 18-6091 and GLM reference 12884 are additional aftermarket catalog references associated with the 6H1-45251-02 application.

• Replacement sacrificial anode for Yamaha/Selva outboard applications
• Aluminum anode construction identified in the supporting aftermarket catalog reference
• Sold as one anode; mounting hardware is not included unless separately specified
• Verify the original anode shape, mounting arrangement and part number before ordering

Part Number Matrix

Use the references below to compare the anode with your original part. Part-number references do not replace a complete visual and application check.

Engine & Model Compatibility

This anode is listed for the following Yamaha/Selva outboard horsepower applications:

Year, model-code and serial-number coverage is not specified in the product record. Confirm the OEM reference and the physical mounting pattern for your exact engine before purchase.

Technical Specs

Product type

Replacement sacrificial anode

Material

Aluminum

Application

Selected Yamaha and Selva outboard applications

Primary function

Helps protect underwater metal components from galvanic corrosion

What's in the Box

• 1× replacement aluminum outboard anode

Bolts, washers and other mounting hardware are not included in the stated package contents.

Installation Notes

1. Turn off the engine, remove the ignition key and secure the boat before beginning work.
2. Remove the depleted anode and retain the original hardware if replacement hardware is not supplied.
3. Clean corrosion, paint and debris from the mounting contact surfaces so the anode can make clean electrical contact with the protected assembly.
4. Position the replacement anode in the same orientation as the original and install the correct hardware for your engine.
5. Tighten the fasteners to the engine manufacturer's specification. Do not overtighten or damage the threads.
6. Do not paint, grease or apply insulating coating to the anode or its contact surface.
7. Inspect the anode periodically and replace it when substantial erosion, deep pitting or approximately half of the original material has been lost.

Troubleshooting & FAQ

Which engines is this anode listed for?

The company product record lists Yamaha/Selva applications at 25HP, 50HP, 55HP, 75HP, 80HP, 85HP and 90HP. Check the OEM reference and mounting pattern for the exact model and serial range.

Which OEM numbers does this anode replace?

The stated Yamaha OEM replacement references are 6H1-45251-02 and 6H1-45251-03. Catalog references may use a suffix such as “-00”; compare the complete number and the original part before ordering.

Is this a complete installation kit?

No. This product is listed as one anode only. Bolts, washers and other hardware are not included in the stated package contents.

How do I know when the anode needs replacement?

Replace it when it shows heavy erosion, deep pitting, loosening or approximately 50% material loss. Inspect more frequently in saltwater, brackish water or areas with strong stray electrical currents.

Can this anode be used in freshwater and saltwater?

Anode performance depends on the water chemistry and the boat's overall corrosion-protection system. Confirm that the aluminum anode type is appropriate for your operating environment and follow the engine manufacturer's guidance.

Why must the anode remain unpainted?

A bare, clean contact surface is required for electrical continuity. Paint or other insulating coatings can prevent the anode from providing effective sacrificial protection.

Is this an OEM Yamaha part?

No. This listing is for a replacement aftermarket anode designed to replace the stated Yamaha OEM references. Yamaha is a trademark of its respective owner.

Safety & Important Info

• Confirm the original OEM number, anode shape, mounting arrangement and engine application before ordering.
• Do not assume fitment from horsepower alone; model, year and serial conditions can affect compatibility.
• Disconnect power and secure the engine before installation.
• Professional installation is recommended when the mounting hardware, threads or protected assembly are damaged or corroded.

About Sea Sierra

• Marine replacement parts selected for practical fitment and service use.
• Clear application and reference information to help customers identify the correct replacement.
• Support is available for part-number and compatibility questions before purchase.