Rank: Marinette Royal Aluminum Poster (300+) posts
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RiverRatt wrote:I own a 24' Monark (now SeaArk) old DNR patrol boat. The Monark has a plaque that says "Do not use Hull for common ground". I noticed the Marinettes do. Who is correct? Robert
There should be only one grounding point for your entire electrical system. On most boats it is the engine block. All other grounds lead to that point. Most accepted standards say don't use the metal hull as a ground as it will lead to galvanic corrosion. Some people will say this is not true. It's been debated for many years. On larger boats the builders put in a grounding strip, usually a large cable or metal bar running the length of the boat which is connected to the block. All ground wires go to the grounding strip. In the new Pro Boatbuilding there is a letter to the editor that mentions, ".....using the engine block as the DC ground is problematic" and can lead to "ground loop currents that in turn can lead to stray-current corrosion on board the vessel" and, ".....the fact that the ABYC still refers to the engine block as the primary negative reference simply points out that the standards need updating"  Surface Interval 1975 28' Express, Single Chrysler M360 ('87), Raymarine E120 MFD, HD digital sonar, GPS, 4KW radome, Sirius satellite weather,
X-10 autopilot with ST70 controller, Yahama 15HP 4 stroke electric start and tilt with hyd steering & remote throttle control,
Floscan 9000, ACR Sat2 406 EPIRB, 24 volt stern thruster, Interlux Brightside paint ('06-'08) Trilux 33 on bottom,
Big Jon electric downriggers, Fish Hawk X4, Traxtech swivel mounts, Bert's track and ratchet holders. Click here for all the equipment details and here for the complete photo album.
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