10491A Complete Anode Kit for Yamaha 300–425 HP Outboards

Protect your Yamaha high-horsepower outboard with a complete, Made-in-America aluminum anode kit engineered to deliver dependable corrosion protection in salt, brackish, or fresh water. Designed for 300–425 HP engines, this kit ensures proper protection of critical underwater components.

Kit Contents

This complete kit includes all required aluminum anodes and mounting hardware:

• 00357A — Qty 1 (Replaces 6AW-45251-00)

• 00358A — Qty 1 (Replaces 6AW-45373-00)

Key Benefits

• Complete aluminum anode kit for Yamaha 300–425 HP outboards

• Aluminum alloy approved for use in all water types

• Manufactured in the USA to MIL-DTL-24779 military specification

• Provides reliable cathodic protection for bonded underwater metals

• Longer-lasting and more effective than traditional zinc anodes

• Environmentally responsible aluminum alloy formulation

Compatibility

Fits:

• Yamaha 300 HP Outboards

• Yamaha 350 HP Outboards

• Yamaha 425 HP Outboards

Why Aluminum Anodes?

Most modern outboards are equipped with aluminum anodes because they provide consistent corrosion protection across salt, brackish, and freshwater environments. Unlike zinc, which can become inactive in low-salinity water, aluminum remains active and effective in all conditions.

Note: Aluminum anodes are supplied as standard with most outboard motors.

Product Specifications

• Material: Navalloy® Aluminum Alloy

• Water Type: Salt, Brackish, Fresh

• Manufacturing Standard: MIL-DTL-24779

• Total Weight: 1.9 lbs (0.9 kg)

• Pack Size: 5½ × 11 × 2¾ in (140 × 280 × 70 mm)

What’s Included

• Complete aluminum anode set

• All required mounting hardware

Ideal For

• Yamaha 300–425 HP outboard owners

• High-performance and offshore applications

• Routine corrosion prevention and maintenance

• Saltwater, brackish, or freshwater environments

Packaging Information

• Standard Pack: 10 kits