Zinc Anodes

ZINC ANODES drawing: zinc anode plan

The electric system and the engine and fuel tanks are earthed through the zinc anode, located on the exterior hull, next to the propeller. This device discharges the static electricity of the boat, thus preventing electrolysis from taking place on the propeller shaft and other underwater metal parts.

If the zinc anode wears out, the discharge will take place through the other metal parts, causing electrolysis and consequently, corrosion. One season with an insufficient zinc anode will ruin the underwater metal parts. Therefore, change the anode when the boat is hauled up for the winter, and also check the anode bonding cables, which have been run inside the hull.

Renew Anode:

Change the hull zinc preferably once a season. Our authorized agent will get spare zincs for you or you can have new ones made fitting the old measurements.

The engine manufacturer recommends a weekly check of the engine “pencil zinc” anode (c.f. Lehman Operator’s Manual). We refer to the manual for engine zinc change. The zinc is located on the heat exchanger.