Originally Posted by Pmcsurf1
Today was my monthly scrape and zinc job bow thruster Allen bolts came out easy enough but I could not get the zincs off to remove the props for a proper scrape. Is there a trick?
For only a month's worth, that sounds quite unusual. However, they can stick at times, and I've found that using a channel lock and just wiggling them a bit will break them loose.
In an extreme case, you can secure the prop so it doesn't turn (I use a wooden dowl), and turn the zinc and you'll twist off the bolt that holds the prop at the same time. I've seen corrosion "weld" them together.
Then clean the shaft, prop, etc., get a new bolt, washer and zinc and reinstall.
I, too, like to look at them monthly to catch anything my diver misses, but often it's every other month. Rarely an issue.