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Prop Size/Pitch for Hunter 31

Discussion in 'Mid-Size Boats' started by Gaylord Liby, Nov 6, 2017. Add this thread to a FAQ

  1. Gaylord Liby

    Gaylord Liby

    Joined Dec 6, 2015
    1 posts, 0 likes
    Hunter 31
    US Satellite Beach FL
    Somehow, I snapped a blade off my prop. Does anyone know the proper size and pitch for a Hunter 31 (Yanmar 3YM20, winged keel, furling rig)? Want to replace the existing 3-blade prop. Does anyone have a preferred source?
     


  2. SFS

    SFS

    Joined Aug 18, 2015
    1,342 posts, 361 likes
    Hunter 31
    US Tampa Bay
    On my 1983 H31, I have a 2 blade prop being driven by the same engine, on a 1" shaft, with a transmission ratio of 2.62:1, and mine is a 14" RH prop, with a 14 pitch. I will eventually move to a 3-blade prop (probably a Campbell Sailor), and keep this one as a spare.

    You may want to check with a marine salvage yard (we have lots in Florida) to potentially save some money, once you select the size and pitch.
     


  3. pateco

    pateco

    Joined Aug 12, 2014
    1,734 posts, 395 likes
    Hunter 31 (1983)
    US Pompano Beach FL
    Mine has a 14 RH 12
     


  4. Ken13559

    Ken13559

    Joined Oct 29, 2005
    1,853 posts, 56 likes
    Hunter 326
    SG Singapore
    My h326 with 2GM20F had a stock 2blades 15"D X10"P.
    Switched to Campbell Sailor Prop 3blades 14"D X 7"P for smooth motoring,
    Then to Flex-O-Fold 2blades 15"D X 12"P for low drag sailing,
    And finally a Kiwi Feathering Prop 15.5"D X 8deg? (lowest pitch, unscrew fully) for smooth motoring and low drag sailing.
     


  5. pateco

    pateco

    Joined Aug 12, 2014
    1,734 posts, 395 likes
    Hunter 31 (1983)
    US Pompano Beach FL
    Campbell Sailor is suggesting a three blade 13x8 as a replacement. They say they are no longer making 2 blade props.
     


  6. SFS

    SFS

    Joined Aug 18, 2015
    1,342 posts, 361 likes
    Hunter 31
    US Tampa Bay
    Campbell Sailor suggested a 14x8 to me, 3-bladed. I have a Yanmar 3YM20.