Lewmar – Anode Kit for 250TT – 589550

Lewmar Anode Kit for 250TT Thruster 589550

The Lewmar 589550 Anode Kit is the OEM replacement sacrificial anode set for the Lewmar 250TT bow or stern thruster. Anodes protect the thrusters metal components from galvanic corrosion by sacrificing themselves in place of the thruster housing, tunnel, and drive components. Regular anode replacement is a critical part of thruster maintenance depleted anodes leave the thruster unprotected.

Key Features

• OEM Lewmar replacement correct alloy and geometry for the 250TT thruster
• Sacrificial corrosion protection protects thruster housing and metal components from galvanic attack in saltwater and brackish water
• Kit format includes all anodes required for a complete replacement service on the 250TT
• Compatible thruster: Lewmar 250TT bow/stern thruster

Parts Desk Insights

• Replace anodes annually or when 50% depleted: Do not wait until anodes are fully consumed. Once an anode is more than 50% depleted, it no longer provides adequate protection. Inspect anodes at every haulout and replace at least once per season in saltwater use.
• Galvanic corrosion risk: If the thruster is operated with depleted or missing anodes in saltwater, galvanic corrosion can attack the thruster tunnel, housing, and drive components leading to expensive repairs or full thruster replacement. Anodes are cheap insurance.
• Anode alloy matters: Use the correct OEM anode alloy for your operating environment. Zinc anodes are standard for saltwater; aluminum anodes are preferred for brackish water; magnesium anodes are used in freshwater only. Confirm your operating environment before substituting a non-OEM anode.
• Confirm thruster model: This kit is for the 250TT specifically. Lewmar thrusters use different anode kits by model and tunnel diameter confirm your thruster model before ordering. Call the parts desk if youre unsure which anode kit fits your installation.