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Old 23-11-2011, 16:46   #1
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Join Date: Sep 2008
Location: Toronto, Canada on Lake Ontario
Boat: Roberts Offshore 38
Posts: 1,287
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Wear and Spalling on the Prop Shaft . . .

I finally got my shaft out, its 48 inches, of 1.125 stainless. There are 2 spots on it where there may be wear, evidenced by a section of really shiny surface where the cutless was, and where the shaft packing was. and one spot where there is some spalling. This is evidenced by fine scored rings and tiny chunks torn out where the shaft log ran. I had to clean it up with emery paper, as it was caked with bottom paint, and anode deposits, but it cleaned up nicely and the shiny spots have pretty much disappeared. I suspect the original owner, who had the boat built, never once pulled the shaft out to check it.

I am planning on sending it out to get it checked over and have the new coupling put on but am thinking I should check it first. I have the micrometers needed, but does anyone know the allowable wear is before replacement is contemplated?? The shaft log is a bronze deal, with a grease fitting. It looks like it might be a tad worn inside, haven't cleaned it up yet.
SV Sabre Dance, Roberts Offshore 38
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