Sierra 18-6028 Zinc Anode - Replaces 392123 - For Exhaust Housing V4 & V6 (1983-90)

The Sierra 18-6028 is a zinc sacrificial anode engineered for the exhaust housing on V4 and V6 marine engines (1983-90). As a sacrificial anode, it corrodes in place of surrounding metal components, protecting the exhaust housing from galvanic corrosion caused by electrolysis in the water. Made of zinc, the standard anode material for saltwater and brackish-water use, the 18-6028 is a direct replacement for OEM part number 392123.

Routine anode replacement is one of the simplest and most important maintenance tasks for any boat owner, since a depleted anode leaves expensive engine and drive components exposed to corrosion damage. This anode is sized specifically for exhaust housing applications on V4 and V6 engines and installs in the same location as the original equipment part it replaces.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-6028
• Material: Zinc
• Application: Exhaust Housing
• Engine Fitment: V4 & V6 (1983-90)
• Replaces: 392123
• UPC: 030999563996
• Weight: 2.24 pounds
• Product Dimensions: 3.5 x 7 x 4.75 inches

Fitment

• V4 & V6 engines (1983-90) - exhaust housing

Replaces (OEM)

• 392123

Frequently Asked Questions

What does the Sierra 18-6028 anode fit? It is designed for the exhaust housing on V4 and V6 engines from 1983 through 1990.

What OEM part number does the 18-6028 replace? The Sierra 18-6028 replaces OEM part number 392123.

What material is the 18-6028 anode made from? It is made of zinc, which is the standard sacrificial anode material used to protect exhaust housings from galvanic corrosion.

How much does the 18-6028 anode weigh? The Sierra 18-6028 weighs 2.24 pounds.

What are the dimensions of the 18-6028 anode? The product measures 3.5 x 7 x 4.75 inches.

Where on the engine does this anode install? The 18-6028 mounts on the exhaust housing of applicable V4 and V6 engines.

Is the 18-6028 a genuine Sierra part? Yes, part number 18-6028 is a Sierra-branded zinc anode, not a generic aftermarket substitute.

Why does the exhaust housing need a sacrificial anode? A zinc anode on the exhaust housing corrodes in place of the surrounding metal, protecting the housing from galvanic corrosion in the water.

Will the 18-6028 fit engines outside the 1983-90 V4/V6 range? The Sierra 18-6028 is specified for V4 and V6 engines built between 1983 and 1990 exhaust housings; fitment outside that range is not confirmed.

How do I know when to replace this anode? Inspect the 18-6028 anode periodically and replace it once it has visibly corroded down to protect the exhaust housing from damage.

What is included when I order the 18-6028? You receive one Sierra 18-6028 zinc anode for the exhaust housing.