After reading much information here about the importance of not grounding electrical equipment to an aluminum boat I've now removed all grounds from the boat and put them on a home run to the battery with a grounding block out to each unit. Some background the engine is model# E50TLEUC. The boat is a 1956 Starcraft 16' boat or at least that's what the paperwork says. Also I only run this boat in fresh water. There is no electrolysis going on at this point that I can find. But here's my first question - the outboard had a ground from the block to the boat and then back to the battery. Is there any mechanical reason to ground the outboard to the hull? Second question - isn't the outboard grounded to the hull by being bolted to the aluminum stern? If so, and I suspect it is, should this be isolated somehow? I've found many posts about batteries and electronics being grounded to the hull but none on the outboard itself. Thanks for your help!
