Aftermarket Yamaha Lower Unit Anode 677-45251-00 4A 5C F8 F9.9

Aftermarket sacrificial lower-unit anode replacing Yamaha 677-45251-00-00. It is intended to corrode in place of compatible gearcase components and should be inspected as part of routine outboard maintenance.

Key Features

• Aftermarket replacement for the listed Yamaha anode
• Fits the matching lower-unit mounting position
• Helps reduce galvanic-corrosion damage
• Simple bolt-on service item

Technical Specs

• Product type: sacrificial anode
• Location: lower unit / gearcase
• Quantity: 1
• Condition: new aftermarket replacement
• Fastener: reuse or replace the correct engine fastener as required

Compatibility / Fitment Guide

Commonly listed for Yamaha 4A and 5C two-stroke models and selected F8A, F8B, F9.9A and F9.9B four-stroke models. Fitment can vary by model suffix and year. Confirm 677-45251-00-00 in the Yamaha parts diagram and compare the mounting shape before ordering.

Part Number Cross Reference

• Yamaha: 677-45251-00
• Yamaha: 677-45251-00-00

Frequently Asked Questions

Is this a genuine Yamaha anode?
No. This listing is for an aftermarket replacement.

When should the anode be replaced?
Inspect it regularly and replace it when substantially consumed, damaged or no longer making clean metal-to-metal contact.

Can it be painted?
No. Paint or sealant prevents the sacrificial anode from working correctly.