1-3/4 x 3/8 MOTOR ANODE

Function and technical context

Sacrificial anodes for outboard motors act as an electrochemical shield, absorbing galvanic corrosion that would otherwise attack the structural metal parts of the engine: the motor foot housing, the propeller shaft or the water covers. This anode with dimensions 1-3/4" x 3/8" (reference CME0) is installed directly on the engine block or casing in a strategic position to maximize its sacrificial surface in contact with water. Its function is critical in salt or brackish water environments, where the potential difference between different metals exponentially accelerates corrosion; If the anode is completely consumed without being replaced, the electrochemical attack begins to act on noble engine components whose repair or replacement is significantly more expensive.

When to replace this part?

The clearest sign that the anode must be changed is a reduction in its mass of more than 50%, at which point its protective capacity drops drastically; Visually, an irregular body can be seen, with craters or reduced to a fraction of its initial size. As a general rule of preventive maintenance, engine anodes should be inspected at least once a season and replaced before wear exceeds that threshold, and it is common to change them every full season in high salinity areas. Replacing the anode in time is the most economical maintenance intervention available to avoid damage due to galvanic corrosion in structural components of the engine that can render the boat unusable.

Compatibility table