I need prop suggestions

Discussion in 'Prop Shop' started by travischilders, Nov 29, 2009.

  1. travischilders

    travischilders I Love microskiff.com!

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    I just got a 13ft custom skiff with a 20hp 2 smoke yami on a bobs mini jack and saturday I bent the already abused allum 3 blade prop. I pulled the prop but it has no markings to determine the pitch and it appears to have been painted a few times. boat speed Top end is great but I need more hole shot and I'm thinking about a SS 4 blade.
    Anyone have ideas on what brand, size and pitch to get?
     
  2. Brett

    Brett > PRO STAFF <

    Should be a part number inside on the hub wall.
    With that you can find out the diameter and pitch.

    And as always, use a tachometer to ensure you're using the right prop for your boat.
     

  3. travischilders

    travischilders I Love microskiff.com!

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    from what I can tell the hub #'s are 022805 or 022605.
    This is greek to me, anyone know what prop this is?
     
  4. Brett

    Brett > PRO STAFF <

    That number does not show up in a search of yamaha parts.
    What year is the motor?
     
  5. wcnfl

    wcnfl Well-Known Member

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    The 20 Yamaha is no longer produced in 2 stroke model. Here are the standard prop sizes that come on a new 25 hp (9 7/8 x 11 1/4 Alum) and the 15 hp (9 1/4 x 10 1/2 Alum). I would think one of these props would work.
     
  6. travischilders

    travischilders I Love microskiff.com!

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    so who makes the cheapest allum 4 blade?
     
  7. noeettica

    noeettica Well-Known Member

    3,675
    106
    2,268
    That Does not seem like enough ...
     
  8. travischilders

    travischilders I Love microskiff.com!

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    it appears the old prop is 12 pitch.
    so a 10 or 11 4 blade would be ideal?
     
  9. noeettica

    noeettica Well-Known Member

    3,675
    106
    2,268
    I would go with a 12 pitch If you are near me I have a 13pitch you can test ...
     
  10. travischilders

    travischilders I Love microskiff.com!

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    Noettica, I have read other posts that suggest to down 1 pitch when going from a 3 to 4 blade. what is your experience with the 4 blade? with the cost of the ss I want to get it right as possible the first try.
     
  11. Brett

    Brett > PRO STAFF <

    With the cost of that 4-blade stainless, you could probably buy
    three 3-blade aluminums. And if you live up to your forum-name ;)
    You will damage that 4-blade just as fast as the 3 blade. At least
    with three 3-blades aboard, couple of minutes with pliers and you're on the way home.
     
  12. travischilders

    travischilders I Love microskiff.com!

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    i ended up with a powertech 4 blade 9 pitch. from the first water trial i lost lots of speed but better hole shot. also the engine doesn't appear to be over reving at wot. do you prop experts think it could handle a 11 pitch to get some speed back?
     
  13. jimbarn1961

    jimbarn1961 GOT FEESH?

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    Need a tiny tach, they are only $40 to $45 www.tinytach.com money well spent in IMHO. Pretty hard to judge RPM's by ear to prop a boat correctly.

    just my .02