Zincs: yes or no?

[Steve S]

Pretty sure your prop is geared down and wouldn't be running at 4,000 rpm. The ratio varies on what equipment you have...


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[Turtlesboat]

I've never had shaft zincs come off. put them on and tighten them down. Then take a hammer and hit the zinc all the way around, this usually gets you another turn on the bolts (don't "tap" hammer, but not like you're driving a railroad spike). then take nail polish and paint a line where the bolts goes through the zinc. This prevents that part of the zinc from getting eaten so the bolt doesn't break through.