Prop information

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Rick19256

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Nov 23, 2005
2
- - Baltimore MD
Hello. I’m new here. I have searched the archives, but have not come up with the information I’m looking for. Can anyone tell me the proper diameter and pitch for a 3 blade prop on my 1981 Morgan 321? The 15” 3 blade on thewre now seems to be overloading the Yanmar 2QM20, as it will not run up to speed when I put her in gear. Thanks Rick
 
Ross

Ross

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Jun 15, 2004
14,693
Islander/Wayfairer 30 sail number 25 Perryville,Md.
Prop size

Rick, there is another forum that has a calculator for all of that. If you can tell me your water line length, displacement, engine hp, reduction gear ratio I can plug the numbers in and get an answer.
 
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Rick19256

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Nov 23, 2005
2
- - Baltimore MD
Thanks Ross

I'll have to look up the gear ratio, but I'll get back to you. Do you have the nake of the site? Thanks again
 
Ross

Ross

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Jun 15, 2004
14,693
Islander/Wayfairer 30 sail number 25 Perryville,Md.
prop site

Try this ! I think you have to join for access. http://boatdiesel.com/Forums/Index.cfm?cfapp=6&Forum_ID=81&SearchKey=
 
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