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 3/4 hex prop conversion 
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MMT Member

Joined: Mon Aug 22, 2011 10:07 am
Posts: 25
Post 3/4 hex prop conversion
What’s your guys thoughts on this? Would it be possible to take a 3/4 hex shaft prop and thread it to 3/4? I’m guessing this won’t work but I figured I’d ask y’all. Maybe somebody has tried it.


Mon May 27, 2019 11:32 am
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MMT 1000 Club

Joined: Mon Dec 31, 2012 11:07 pm
Posts: 4820
Location: West Monroe, LA
Post Re: 3/4 hex prop conversion
We saw a big blade once that was part hex, part threads. Not sure of your reasoning for doing it, but it wouldn't be that hard if you had a halfway functional machinist floating around. Getting a new prop would probably be cheaper.

#CFFITR
#GhostBoat
#Whoneedsphysicsihaveamudmotor


Mon May 27, 2019 11:44 am
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MMT Member

Joined: Mon Aug 22, 2011 10:07 am
Posts: 25
Post Re: 3/4 hex prop conversion
I haven’t been able to find a big blade style prop in 3/4 threaded. Stock prop is undersized afternoon performance mods have been added. I’ve got throttle for days but I just don’t have enough prop now.


Mon May 27, 2019 12:44 pm
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MMT 1000 Club

Joined: Sat Sep 30, 2017 7:10 pm
Posts: 1872
Post Re: 3/4 hex prop conversion
More pitch and cup would probably be your fix if you have rpms for days


Mon May 27, 2019 3:27 pm
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MMT Addict

Joined: Sun Aug 09, 2009 12:50 pm
Posts: 574
Location: Muscatine, Iowa
Post Re: 3/4 hex prop conversion
I had a threaded Big Blade prop converted to a 3/4" hex shaft size. I would assume a machine shop could go the other way. I also had a machine shop make me replacement shafts both threaded and Hex. Surface drives and long tails with replacement bushings.


Thu Jun 06, 2019 4:54 pm
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