Cosmetic Care & Maintenance
7-29
Zinc anodes in brackish or salt water need to be checked more
frequently. If the anodes seem to be requiring frequent replacement
there may be a boat leaking DC current into the water taxing the anodes.
This is especially possible around a marina environment. Contact a
marine professional who can measure the galvanic activity with a special
electrode and electric VOA meter. Refer to the engine manufacturer’s
manual for exact anode location and detailed information. Stern drive
or related parts damage due to galvanic or stray current corrosion
is not covered under the Regal limited warranty.
SACRIFICIAL ANODE
VOLVO SHOWN
Zinc Anodes
Sacrifi cial zinc anodes are located on the stern drive housing, trim
cylinders and/or propshaft to protect softer metals exposed to the
water. Electrolysis attacks the least noble metals fi rst. Because zinc is
a less noble metal, it will decompose before other metals. Check these
zinc anodes periodically and have them replaced when they are 30%
consumed. Notwithstanding, zinc is the most popular metal used to
protect parts that are exposed to saltwater, freshwater or brackish
water.
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