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Prop Size

I have a 1984 Hunter 34′ sailboat. Installing a new engine, Yanmar 3ym30 (29 HP). What size prop would you recommend? I’m strictly a coastal cruiser and would like a 3 blade. What are your thoughts? Carl W.

Hi Carl: There are too many variables to do this off the cuff. These include boat characteristics, engine prop curve, transmission reduction, and the type of prop (feathering, folding, two blade, or three blade). Best bet is to talk with a prop shop in your area that is familiar with the boat. There is also a large section in our Offshore Cruising Encyclopedia on propellers, which might help you in making a choice. Regards – Steve


Posted by Steve Dashew  (November 30, 1999)

This entry was posted on Tuesday, November 30th, 1999 at 12:00 am and is filed under Cruiser's Tech Talk, Propellors. Both comments and pings are currently closed.




2 Responses to “Prop Size”

  1. Dennis Mead Says:
    May 17th, 2009 at 3:22 pm

    What do you think of useing cummins new Zeus drives in a new-build custon full displacement expedition
    yacht?


  2. Steve Dashew Says:
    May 19th, 2009 at 11:15 am

    Too vulnerable for our application or other expedition type use and the high speed configuration of the props and gearing is more suited to high speed hulls.