I have had some minor electrolysis going on on my prop. I have had a zinc on the shaft, but I was told perhaps the problem is that the shaft isn't properly bonded to other underwater metal parts. One person suggested to my neighbor boat that they put a brush on the shaft and bond it to the engine ("ground"). I tested the resistance between the shaft and ground on the engine and found it to be zero (or the lowest reading on th ohm meter anyway). Am I missing somthing, or does that indicate a bursh to the shaft and ground would be superfluous?
Bonding the shaft to ground to prevent electrolysis
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