Forums General Discussion Max-Prop

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    • #69053
      cstewart
      Participant

      Does anyone have a Max-Prop 3 blade classic. If so, would you know the pitch you have set. My boatyard took the prop off and mixed up the pitch settings and I am looking for a starting point. Mine is a 21″ prop, 1.5″ shaft, and of course Left screw. I still have the W-60.

    • #82122
      Anonymous

      Charlie,

      We have a 20″ 3-blade Max-prop. I can check tomorrow morning at the
      boat for our settings for 13 pitch which works well with our W-58. Don’t
      know if our settings will work for you but they should be close.

      Dave

      Doris E. #178

      On 3/3/15 8:58 PM, cstewart via maillist wrote:

      Does anyone have a Max-Prop 3 blade classic. If so, would you know the pitch you have set. My boatyard took the prop off and mixed up the pitch settings and I am looking for a starting point. Mine is a 21″ prop, 1.5″ shaft, and of course Left screw. I still have the W-60.


      "People cannot discover new lands until they have the courage to lose sight of the shore."
      Andre Gide 1869-1951

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    • #82123
      cstewart
      Participant

      Thanks Dave. The 13 was the number I was looking for. I’m sure there is a chart to convert that to the settings. I wonder if the pitch should go up or down for a 21″ oversized prop.

    • #82124
      Anonymous

      Call PYI in Seattle in the morning. Talk to Fred Hutchinson. He can tell you which direction you should go for your prop size

      – patOn Mar 3, 2015 10:26 PM, cstewart via maillist wrote:

      Thanks Dave. The 13 was the number I was looking for. I’m sure there is a chart to convert that to the settings. I wonder if the pitch should go up or down for a 21″ oversized prop.


      "People cannot discover new lands until they have the courage to lose sight of the shore."
      Andre Gide 1869-1951

      _______________________________________________
      maillist mailing list

      https://pearson424.org/mailman/listinfo/maillist_pearson424.org

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    • #82125
      cstewart
      Participant

      I talked to Fred at PYI and he knew exactly what the settings were for the P424 with a 21 inch wheel. I’ll know if it works when I get it in the water. Thanks for the help.
      Charlie
      OneEighty, hull 54

    • #82126
      petedd
      Participant

      What setting did he recommend?

      Sent from my Android phone with a spell checker programmed to entertain you.


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    • #82127
      Anonymous

      With our Max-prop we ended up going from a 16 inch pitch with our W63 to a 22 inch pitch with our new Bate Marine 60. Boat speed has increased considerably at lower RPM.

      Steve


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    • #82130
      cstewart
      Participant

      Sorry, Pete, I didn’t see your question.
      For a 21″blade with 1.5″shaft, left turn, and a 3 blade classic Max-Prop, he recommended a 18 degree blade angle and the Max-Prop settings are Y=B and X=N. That was with with the W-60.

    • #82131
      petedd
      Participant

      Thanks!

      Sent from my Android phone with a spell checker programmed to entertain you.


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    • #82132
      Anonymous

      I don’t know much about Max Props, but 21×18 seems way too big. As I recall, my 424 originally came with a 19×14 3-blade fixed prop. I now have an 18.5×12 which feels a bit small but works well enough. Increasing to an 18 pitch doesn’t sound right.

      Rich


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    • #82133
      Anonymous

      Mine is 21x 13 – but it’s a W58 if that matters.

      On Fri, Mar 20, 2015 at 1:22 PM, re.carter— via maillist <
      > wrote:

      Quote:
      I don’t know much about Max Props, but 21×18 seems way too big. As I
      recall, my 424 originally came with a 19×14 3-blade fixed prop. I now have
      an 18.5×12 which feels a bit small but works well enough. Increasing to an
      18 pitch doesn’t sound right.

      Rich


      Original Message


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    • #82134
      Anonymous

      I have a 20″ Max Prop. It was installed originally with the W60. When I
      repowered to the Yanmar 4JH4AE the blades were re-set as recommended by
      PYI, but then we had to reduce the pitch in order to get the engine RPMs
      over 2600. I’ve got the settings documented somewhere on board.

      Regards,
      John Stevenson
      http://www.svsarah.com
      Sarah’s Blog

      On Fri, Mar 20, 2015 at 1:28 PM, Robert Fine via maillist <
      > wrote:

      Mine is 21x 13 – but it’s a W58 if that matters.

      On Fri, Mar 20, 2015 at 1:22 PM, re.carter— via maillist <
      > wrote:

      I don’t know much about Max Props, but 21×18 seems way too big. As I
      recall, my 424 originally came with a 19×14 3-blade fixed prop. I now

      have

      an 18.5×12 which feels a bit small but works well enough. Increasing to

      an

      Quote:
      18 pitch doesn’t sound right.

      Rich


      Original Message


      Post generated from Pearson424 Forum using Mail2Forum

    • #82135
      cstewart
      Participant

      Rich, you are right on with your observation. The 18 pitch which is what I have is too much pitch, and I can only get 2000 rpm max. On the good side, I can get 6kts at 1500rpms and burn much less fuel. It doesn’t seem to lug the engine.
      Charlie

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