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Author Topic: prop size  (Read 1311 times)

May 22, 2006, 10:23:08 PM
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trailoblazin

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prop size
« on: May 22, 2006, 10:23:08 PM »
I have a 20 Osprey with a 150 Johnson.  The boat did not come with a prop.  Any ideas on diameter and pitch?
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May 23, 2006, 08:19:11 AM
Reply #1

JimCt

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« Reply #1 on: May 23, 2006, 08:19:11 AM »
Try asking www.themarinedoctor.com.  I think he'll be able to give you some good info. re: props.
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JimCT
------
\'74 22-2 inboard
HIN:ASPL0953M74J
Chrysler 318
------
\'74 Marshall 22
May 23, 2006, 08:53:39 AM
Reply #2

scott_gunn

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« Reply #2 on: May 23, 2006, 08:53:39 AM »
I have the same boat/motor.  I'll look at mine when I get home.
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May 24, 2006, 09:00:34 PM
Reply #3

trailoblazin

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« Reply #3 on: May 24, 2006, 09:00:34 PM »
I went with a 14 1/2 x 17 prop.  Seems to be good.  topped out at 41 MPH
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May 24, 2006, 09:07:05 PM
Reply #4

scott_gunn

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« Reply #4 on: May 24, 2006, 09:07:05 PM »
Doh!  Sorry I forgot to look.  I'm glad yours worked out.  I top out around there also - some days more, some days less.
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May 24, 2006, 10:41:22 PM
Reply #5

JimCt

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« Reply #5 on: May 24, 2006, 10:41:22 PM »
What's your RPM at WOT?  That'll tell you if the prop is right for the engine.  If its too flat (not enough pitch) you can over-rev the engine
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JimCT
------
\'74 22-2 inboard
HIN:ASPL0953M74J
Chrysler 318
------
\'74 Marshall 22
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