E25+ W/1GM Diesel, Prop size

My 1983 has a 12x10RH prop. After replacing the cutless bearing, shaft and coupling half this winter season, I now discover that the prop tip clearance is 9.2% or 1.11". From what I have learned the tip clearance should be 10% - 15% of prop DIA. What size props are the rest of us E25's using?. Any one know what prop was originally spect:
Thanks
Rich
s/v Breeze
 
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