[Public-List] selecting prop for new Yanmar 3YM20

[Mike Lehman]

Here is how I selected the right prop when I repower several years ago
 
http://www.miwheel.com/MIWheel/propit/main.htm
 
Mike Lehman  ><((((º>`·.¸¸.·´¯`·.¸><((((º>`·.¸¸.·´¯`·.¸><((((º>  > From: jcscott at cpsc.com> Date: Tue, 22 Apr 2008 16:08:57 -0400> To: public-list at lists.alberg30.org> CC: jcscott at cpsc.com> Subject: Re: [Public-List] selecting prop for new Yanmar 3YM20> > Hi All:> > No responses thus far on my earlier query (April 19) regarding new > prop selection. I need make a choice and in the absence of > contradictory recommendations I will likely go with the three-blade > 13X12. A little update, Claude at Bay Shore Marine, who sold me the > new Yanmar, clarified that while under sail I should have the > transmission in reverse to lock the prop so that I wont wear out the > clutch (as I would if I kept her in neutral to reduce drag). My > earlier posting, for which I would still welcome comment, was as > follows:> > Hi All.> > I finally made my decision and made the swap from Gray Marine to > Yanmar diesel (21 hp 3YM20). Then I got the shock of seeing the > recommended (optimal) prop choice, a three blade 15X10 (with the > KM2P-1 gearbox ration of 2.62 in forward). It’s huge. Although a > 13X12 is acceptable, that’s still pretty big (and as I understand it, > it can't left in neutral to reduce drag when I'm under sail because > the transmission won't get lubricated). An up side is that with a > stainless shaft I can keep the old shaft tube and stick with the 7/8 > size.> > For any of you with a 3YM20 (@ KM2P-1/2.62) what is the prop you’ve > selected and what has been your experience?> > Thanks> > John Scott> Wooshkeetaan #26> > > > > _______________________________________________> These businesses support your Association:> http://www.alberg30.org/store/A30supporters.html> Please support them.> _______________________________________________> Public-List mailing list> Public-List at lists.alberg30.org> http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
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