Sierra 18-6095 Zinc Gearcase Anode - Replaces 393023, 436745 - Fits 1982-1987 60-300 HP Outboards

The Sierra 18-6095 is a zinc sacrificial anode engineered for use on outboard gearcases, protecting the lower unit from galvanic corrosion caused by electrolysis in saltwater and brackish environments. Zinc anodes work by corroding preferentially to the surrounding metal components, so as long as the anode is present and in contact with the gearcase, it takes the corrosive damage instead of the propeller shaft, housing, and other submerged metal parts. This makes routine anode replacement one of the most important and cost-effective maintenance tasks for any outboard-powered boat.

This anode is designed for 1982-1987 outboards in the 60-300 HP range and mounts directly to the gearcase. It is manufactured from zinc for reliable sacrificial performance and is built to meet or exceed the specification of the original equipment part it replaces. Boat owners running outboards in this horsepower and year range can use the 18-6095 as a direct replacement without modification.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-6095
• Material: Zinc
• For Use On: Gearcases
• Horsepower Range: 60-300 HP
• Years: 1982-1987
• Weight: 0.61 pounds
• Product Dimensions: 0.39 x 0.39 x 0.39 inches
• UPC: 808282237363
• OEM Cross-Reference: 393023, 436745

Fitment

• 1982-1987 outboards, 60-300 HP, gearcase mount

Replaces (OEM)

• 393023
• 436745

Frequently Asked Questions

What does the Sierra 18-6095 anode fit? The Sierra 18-6095 is designed for gearcase mounting on 1982-1987 outboards rated 60-300 HP.

What OEM part numbers does the 18-6095 replace? This zinc anode replaces OEM numbers 393023 and 436745.

What material is the 18-6095 anode made from? Zinc. The Sierra 18-6095 is a zinc sacrificial anode, suited for saltwater and brackish-water corrosion protection.

Where does the 18-6095 anode mount on the outboard? It mounts on the gearcase, protecting the lower unit from galvanic corrosion.

How big is the Sierra 18-6095 anode? The 18-6095 measures 0.39 x 0.39 x 0.39 inches and weighs 0.61 pounds.

Is the 18-6095 a genuine Sierra part or aftermarket? The 18-6095 is a Sierra-branded part manufactured to meet or exceed the specification of the original equipment part it replaces.

How do I know when to replace a gearcase anode like the 18-6095? A zinc anode such as the 18-6095 should be replaced once it has corroded away to roughly half its original size, since it protects the gearcase by sacrificing itself to electrolysis.

What horsepower outboards use the Sierra 18-6095? Outboards in the 60-300 HP range from the 1982-1987 model years use the 18-6095 gearcase anode.

Does the 18-6095 come as a single anode? Yes, the 18-6095 is supplied as a single zinc gearcase anode.

Why use zinc instead of another anode material for this application? Zinc, as used in the Sierra 18-6095, is the standard sacrificial anode material for saltwater use because it corrodes preferentially to protect the surrounding gearcase metal.