Optimum Prop

Discussion in 'Prop Shop' started by bmann420, Aug 5, 2009.

  1. bmann420

    bmann420 Well-Known Member

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    What's everyone's opinion on the optimum prop for my merc 15hp two stroke? My skiff is the snooker2 listed on the bragging page and she cavitates a lot even when running wide open on slick clam water.

    Aluminum, Stainless, 4-blade, 3-blade, pitch?????? I am confused.
     
  2. iMacattack

    iMacattack busy, too busy

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    Moved to "prop"er topic section. ;)

    Cheers
     

  3. noeettica

    noeettica Well-Known Member

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    Bought this little number from Capt'n Ron and i am Shickled Titless !!! Bites the water Like a Pit bull !!! [smiley=pirate.gif] Dave


    [​IMG]
     
  4. bmann420

    bmann420 Well-Known Member

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    Wow that prop looks bad ass. Is that on a 15 two stroke?
     
  5. Tom_C

    Tom_C Well-Known Member

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    How high is your motor mounted?

    Can you adjust the motor lower?

    Do you only cavitates when going strait?

    How is she when you turn?

    Possible fixes:

    SS 4 blade Cupped Prop = $$$$

    6 inch adjustable Jack Plate, keeping your motor at same or lower height. = $$$

    Peratrim type Cav plate. To keep water on prop but not add lift. = $$

    Cut down the transom height. = $
     
  6. bmann420

    bmann420 Well-Known Member

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    Cavitates mostly when running straight. What is a peratrim type cav plate?

    I have a hydrafoil on the motor already but it hasn't helped much. Do you think I need to lower the motor some on the transom?
     
  7. JoeWelbourn

    JoeWelbourn "The Flats Solicitor"

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    Tom C,

    I got a call asking for help today, I sent him to you. Mitch ws his name? No reply needed.

    Float Shallower,
    Joe
    Carbon Marine
     
  8. Tom_C

    Tom_C Well-Known Member

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    Thanks Joe [smiley=1-beer-german.gif]


    snooker


    www.permatrims.com

    [​IMG]

    The differnt between a hydrafoil and a Permatrim is a hydrafoil will add lift, a Permatrim is designed to hold water on your prop.


    Depending on the motor height, lower the motor some on the transom may be all you need, or removing the hydrafoil may change  hull running angle allow your transom to drop and your bow to rise some lowering your prop.

    Bertt started a great post about Motor Height, JackPlates, and Hull Running Angle.

    http://www.microskiff.com/cgi-bin/yabb2/YaBB.pl?num=1235777190
     
  9. noeettica

    noeettica Well-Known Member

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    I will have several permatrims soon ...
     
  10. Tom_C

    Tom_C Well-Known Member

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    Home made [smiley=1-biggrin.gif]

    [​IMG]

    What I like about Permatrim is they are custom designed for differant makes of motors.
     
  11. TomFL

    TomFL Well-Known Member

    Dave, turn those bolts on your cav plate upside-down so the nuts are on top of the cav plate. Better yet go to a pan head or button head bolt and then do the above. This will help clean up the water flow around the prop a bunch.

    -T
     
  12. bmann420

    bmann420 Well-Known Member

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    Actually I have a se200 installed and not a hydrafoil.