Good afternoon all. I need some help figuring out on the thread castle nut used to hold the prop on my 34+ . It's a 1 1/8 stainless steel shaft with a tapered end. I know the thread is not 3/4 - 10 because I bought replacement castle nut with that thread and they did not work, it looked small .
Long story short I sent my Martec folding prop for a rebuild while I was in the yard and the post office lost it. I was able to get back in the water using my old fixed 3 blader and now I'm looking to replace the prop with a new Flex - O - Fold. I have all the other specs I need but I don't know the thread on the castle nut. I did not see any marking on the old one nor do I see any info in the specs listed in the owner's manual. Again, it's not 3/4 - 10, it might be a metric size? Thanks in advance for your help -Francois Rivard 1990 34+ "Take Five" Lake Lanier, GA
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