Attainable Adventure Cruising. Question : I was wondering if you think the engine should be grounded to the hull or not [on an aluminum boat]. Answer : Definitely not, in our opinion, the engine chassis should be carefully insulated from the hull. Further, the propeller shaft should be insulated from the engine. The easiest way to do the latter is with a DriveSaver.
What we are doing here is making sure that no metals that are more noble on the galvanic series are immersed in the same body of salt water and connected together. One of the above conditions is OK, but not both.
The secret is that they are very carefully insulated from the hull using plastic through hulls, a spacer plate and insulating sleeves around the mounting bolts, so that there is no completed circuit between the bronze and the aluminum. You have constructed a battery and the least noble metal, in this case aluminum, will be eroded. Of course if the boat is protected by hull zincs, as it should be, they will go first since they are even less noble than aluminum.
However, it is a complex subject, so if anyone has anything to add, please leave a comment. Learn About Membership.
John was born and brought up in Bermuda and started sailing as a child, racing locally and offshore before turning to cruising. He has skippered a series of voyages in the North Atlantic , the majority of which have been to the high latitudes. About New Books Topics. Menu About New Books Topics. Like what you just read? Get lots more: Learn About Membership. Oldest Newest. Inline Feedbacks. Load More Comments. This site uses cookies: Find out more.
Okay, thanks.
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