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Old 03-10-2017, 05:03 PM   #6
Ski in NC
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City: Wilmington, NC
Country: USA
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 5,386
Mine is a bit of a hybrid, not on the options. Have shaft zinc and transom zinc. Transom zinc is bonded to engine block among other things. No shaft brush. While setting, gears and bearings conduct bonding current through tranny. Verified via checking for millivolts while sitting- Zero.

Both zinc waste about the same rate and no strange corrosion issues.

I have checked a few shaft brushes and found a voltage differential, so that is why I do not count on them for anodic protection.
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