Aluminum Alloy Anode – Fits Yamaha Outboard 40-90 HP (Replaces 6H1-45251-02-00, 6H1-45251-03-00)

Aluminum Alloy Anode – Fits Yamaha Outboard 40-90 HP (Replaces 6H1-45251-02-00, 6H1-45251-03-00)

This aluminum sacrificial anode is designed for Yamaha outboard engines from 40 HP to 90 HP (2-Stroke & 4-Stroke models, 1988-1990). It mounts on the transom bracket to protect the lower unit and other submerged metallic components from galvanic corrosion, particularly in saltwater environments.

This part is a direct replacement for Yamaha part numbers 6H1-45251-02-00 and 6H1-45251-03-00. It also cross-references with Sierra 18-6091, Tecnoseal 01115, CMP CM6H14525102Z, and GLM 12884.

• Material: High-grade aluminum alloy designed for saltwater use.
• Installation: Mounts directly to the transom bracket using two fasteners.
• Function: Sacrificial anode that prevents costly corrosion damage to your engine's lower unit.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Yamaha owners, here’s a guide to help you identify your engine’s serial/model: Yamaha Serial Number Guide. You can also review exploded diagrams to verify part numbers: Yamaha Parts Diagrams & Catalog.

Technical Specifications

Package Contents

• 1 x Aluminum Alloy Anode (Replaces 6H1-45251-02-00 / 6H1-45251-03-00)
• Note: Mounting hardware (bolts, washers) is not included with this anode.

Installation Guide

1. Safety First: Before starting, disconnect the engine's battery to prevent any accidental electrical discharge.
2. Locate the Anode: Identify the old sacrificial anode on the outboard's transom bracket. It may be partially corroded.
3. Remove Old Anode: Using the appropriate wrench or socket, unfasten the two mounting bolts and remove the depleted anode.
4. Clean the Surface: Thoroughly clean the mounting surface on the transom bracket. A wire brush is effective for removing any corrosion, old paint, or debris to ensure good electrical contact.
5. Install New Anode: Position the new aluminum anode onto the clean surface, aligning the mounting holes.
6. Secure Fasteners: Insert and tighten the mounting bolts securely. Do not overtighten.
7. Final Check: Reconnect the battery. The installation is now complete.

Troubleshooting & FAQ

How do I confirm this anode fits my specific engine?
The best method is to cross-reference your existing part number with those listed in our "Part Number Cross-Reference" table. Additionally, consult the "Compatible Engine Models" table to ensure your model and year are listed. Always visually compare the product images to your old part.

How often should I replace my sacrificial anode?
Anodes should be inspected at least once a year and replaced when they are approximately 50% consumed. The rate of corrosion depends heavily on water salinity, temperature, and electrical currents. More frequent checks are recommended in aggressive saltwater environments.

What is the difference between an aluminum and a zinc anode?
Both are used for saltwater protection. However, aluminum anodes have a higher negative voltage potential, making them more effective than zinc, especially in brackish or less saline water. This anode is specifically aluminum, ideal for broad saltwater protection.

OEM vs. Aftermarket?
This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

How fast do you ship and how much does it cost?
We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

What is your warranty and return policy?
This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.