Sierra 18-6024 Zinc Anode - Replaces 393023, 436745 - For Outboard Gearcases (1982-87)

The Sierra 18-6024 is a zinc sacrificial anode engineered for use on outboard gearcases, protecting underwater metal components from galvanic corrosion. Zinc anodes work by corroding preferentially to the surrounding metal, drawing the electrochemical reaction away from the gearcase and other submerged hardware so those parts last longer in saltwater and freshwater use. This anode is a direct replacement for the OEM 393023 and 436745 part numbers used on applicable gearcases from the 1982-87 model years.

Installation follows the same routine as other outboard sacrificial anodes: the old, corroded anode is removed from the gearcase and replaced with the new zinc unit as part of regular maintenance. Because anode wear indicates the level of corrosion protection remaining, it should be inspected periodically and replaced once it has worn down significantly, well before it is fully consumed.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-6024
• Product Type: Anode
• Material: Zinc
• Color: White
• Recommended Use: Preventing corrosion in outboard motor gearcases and underwater metal components
• Mounting Type: Engine Mount
• Weight: 0.45 pounds
• UPC: 030999563958
• OEM Cross Reference: 393023, 436745

Fitment

• For use on gearcases, 1982-87

Replaces (OEM)

• 393023
• 436745

Frequently Asked Questions

What is the Sierra 18-6024 anode used for? The Sierra 18-6024 is a zinc sacrificial anode used on outboard gearcases to protect the gearcase and surrounding underwater metal components from galvanic corrosion.

What material is the 18-6024 anode made from? It is made from zinc, the standard sacrificial anode material for preventing corrosion on submerged outboard gearcase components.

What OEM part numbers does the Sierra 18-6024 replace? The 18-6024 replaces OEM part numbers 393023 and 436745.

What years is this anode compatible with? The Sierra 18-6024 is intended for use on gearcases from the 1982-87 model years.

How much does the 18-6024 anode weigh? The Sierra 18-6024 anode weighs 0.45 pounds.

Is the Sierra 18-6024 a genuine OEM part or aftermarket? The 18-6024 is a Sierra-brand replacement anode, built to meet or exceed the specification of the original OEM 393023 and 436745 gearcase anodes it replaces.

What color is the 18-6024 anode? The Sierra 18-6024 anode is white in color.

How do I know when to replace a gearcase anode like the 18-6024? A zinc anode such as the 18-6024 should be replaced once it has visibly worn down, since it works by corroding in place of the gearcase and other underwater metal parts.

What is included when I order the Sierra 18-6024? Each order includes one Sierra 18-6024 zinc anode.

Where is the 18-6024 anode mounted? The 18-6024 is an engine-mount anode designed to install directly on the outboard gearcase.

Does the Sierra 18-6024 protect against saltwater corrosion? Yes, as a zinc sacrificial anode, the 18-6024 is designed to corrode preferentially and protect the gearcase and nearby metal components from galvanic corrosion in marine use.