The reason to ground them is to prevent lightning flashovers. IMHO this is outweighed by the corrosion issues caused by this wiring.
Joe Della Barba Coquina From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Don Kern via CnC-List Sent: Tuesday, August 14, 2018 3:06 PM To: cnc-list@cnc-list.com Cc: Don Kern <don-k...@cox.net> Subject: Re: Stus-List [EXTERNAL] Re: Galvanic corrosion (Della Barba, Joe) I also am of the convention of none of the overboards that have plastic/rubber inboard should be grounded. When I first got the boat in 1980 we were eating zincs, one every other month. I read an article at the time that basically said that if you have a copper base paint you were setting up eddy currents between the overboards and the prop zinc. I remove all the grounds from the overboards and have had the zinc last the whole season (May-Oct), since then. My two cents Don Kern Fireball 12708 C&C 35 MK2 (1974)
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