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#1
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prop calulator
I need to change my prop,I have 1977 v20 steplift with a GM inline six cylinder 165hp,omc stern drive.Can anybody advise me on how to work out measurments of my existing prop.[I believe it is the standard 3 blade original]
Thanks...genesis 08 going nowhere, Regards Brian.......... 
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#2
03-28-2008, 10:20 AM
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Brian, a couple of the guys posted these links a while back. They may be a help to you. If not, hang on as I'm sure the guys will have plenty of good advice for you.
Ferm posted this one: http://www.rbbi.com/folders/prop/propcalc.htm BS posted this one: http://continuouswave.com/cgi-bin/propcalc.pl Steve
__________________
 1990 Hydrasports 2000cc Vector with 96 200HP Oceanrunner. Saved by grace alone, through faith alone, in Christ alone http://www.providencerpchurch.com/
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#4
03-28-2008, 02:20 PM
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14 x 17 was the first prop, it went well and top out out good, but was a dog out the hole.
2nd was a 15 x 15 1/4 It got me up and out the hole fast!! Great when I had a load, but would lose a little on the top end. Seeing a 70 something V with a 165 I/O had a top end of 30 MPH + or - It was not a big deal to me.
__________________
1986 V20  Old Fishermen never die, we just SMELL that way!!
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#5
03-28-2008, 02:58 PM
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prop
Thanks mac,
At least that gives me a starting point,I know the diameter is 14 so I will takeit from there.The prop has no splines it uses a pin to secure thru the shaft,that might help a bit further with identification! Regartds Brian..........
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