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Ask a Specialist
Got Questions? Get Answers.
Do you have maintenance or safety questions about your boat or yacht? Ask an ACE Recreational Marine Advisory Services specialist.
Sample Technical Advice
Question: What effect will the newer aluminum anodes used to protect outboard motors and outdrive units have on a boat plugged into shore power?
Answer: The newer aluminum anodes operate at a much higher voltage potential than the normal zinc anodes. When plugged into shore power, a properly wired and bonded boat with aluminum anodes will try to protect every boat in the marina that has a zinc anode. A recent survey confirmed this when it was found that a pair of twin Yamaha engine aluminum anodes was putting a full 500 milliamps (0.5 amps) into the dock ground wire. These anodes would have been consumed in less than a month. A galvanic isolator (UL Marine Listed) must be installed to prevent this.
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