Sierra 18-6133A Aluminum Anode for Yamaha 150-200 HP Outboards

The Sierra 18-6133A is an aluminum sacrificial anode built to fit Yamaha 150-200 HP outboards. Sacrificial anodes protect the more expensive metal components of an outboard's lower unit and drive system from galvanic corrosion by corroding themselves first, so the anode is designed to be a wear item that is inspected and replaced as it erodes. This anode is manufactured from aluminum and is engineered to meet or exceed original equipment quality, giving boat owners a direct-fit replacement option for the Yamaha applications it covers.

Anode material matters depending on the water you run in: aluminum anodes like this one are a common choice across fresh, brackish, and salt water use because aluminum corrodes at a controlled rate while offering broad water-type versatility. Regular anode inspection is a standard part of outboard maintenance, and replacing a worn anode with the correct Sierra part helps keep corrosion protection intact for the drive and lower unit.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-6133A
• Product Type: Anode
• Material: Aluminum
• Fitment: Yamaha 150-200 HP Outboards
• Engine Type: 4 Stroke
• Mounting Type: Transom Mount
• Fuel Type: Gasoline
• Maximum Horsepower: 200 Horsepower
• Weight: 1.7 pounds
• UPC: 808282315696

Fitment

• Yamaha Outboards, 150-200 HP

Frequently Asked Questions

What does the Sierra 18-6133A fit? The Sierra 18-6133A is designed to fit Yamaha outboards in the 150-200 HP range.

What material is this anode made from? This anode is made from aluminum, which offers broad corrosion protection across different water types.

How much does the 18-6133A weigh? The Sierra 18-6133A weighs 1.7 pounds.

Is the 18-6133A a genuine or aftermarket part? The 18-6133A is a Sierra-branded anode manufactured to meet or exceed original equipment quality for the Yamaha 150-200 HP outboards it fits.

What type of engine is the 18-6133A designed for? It is designed for 4 stroke, gasoline-fueled Yamaha outboards in the 150-200 HP range.

How is the 18-6133A mounted? The 18-6133A uses a transom mounting type.

Why does an outboard need a sacrificial anode like the 18-6133A? A sacrificial anode corrodes in place of the outboard's more expensive metal components, so installing an anode such as the 18-6133A protects the lower unit and drive from galvanic corrosion.

How often should the 18-6133A be replaced? Anodes like the 18-6133A are wear items that should be inspected regularly and replaced once they have significantly eroded, since a depleted anode no longer provides effective corrosion protection.

What is included when ordering the 18-6133A? Ordering the 18-6133A includes one aluminum anode for Yamaha 150-200 HP outboards.

Does the maximum horsepower rating limit which Yamaha outboards this anode fits? The 18-6133A is rated up to 200 horsepower and fits within the Yamaha 150-200 HP outboard range.