Prop Pitch

Discussion in 'Prop Shop' started by Gheenoe_Pirate, Nov 1, 2009.

  1. Gheenoe_Pirate

    Gheenoe_Pirate I Love microskiff.com!

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    Just bought a 9.9 for my classic with no prop.. I usually run a 20 hp but got the 9.9 to fish Guana Lake...   Did a little research and I know I'm going to need a little more "bite" to get the classic on plane.. Any recomendations on pitch? Oh yeah, it has an 18" shaft....
     
  2. Flyline

    Flyline Won "Do More With Less" Award!

    I owned a basic gheenoe classic with 9.9 merc 4-stroke....stock propeller (9x 8.3" pitch) is only way to go. Tops out 19 mph then when I added a TSG electric jackplate and my top speed gain to 21-22 MPH.
     

  3. Gheenoe_Pirate

    Gheenoe_Pirate I Love microskiff.com!

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    Cool, thanks for the advice! I'm also having a hell of a time getting the old prop off... I took some pics to verify if I'm going about it the right way... There is not a nut on the end of the prop, just a pin that runs through the middle.. I've been banging on this pin with a hammer and nail and it wont budge... Benn soaking it with some WD 40 also..
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  4. Flyline

    Flyline Won "Do More With Less" Award!

    Use spray oil to soak it in then tap it out if not then drill 1/8 drill bit or 2/32 drill bit then u all good to go.

    WD40 or actone and other braking fuild.
     
  5. noeettica

    noeettica Well-Known Member

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    What make motor is it ?
     
  6. Gheenoe_Pirate

    Gheenoe_Pirate I Love microskiff.com!

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    it's an older Force sail boat engine. I measured the shaft and it's about 18" roughly.. Hope it will still get me on plane???

    Snooky, I think that's what I'm goonna have to do.. Just want to make sure I'm not going to ruin the dang thing.. That pin is the only thing I see keeping the prop on...
     
  7. TomFL

    TomFL Well-Known Member

    So why are you switching props? The old one looks fine!

    OUCH!!!!

    -T
     
  8. Frank_Sebastian

    Frank_Sebastian Well-Known Member

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    Be sure to support the end of the prop shaft on a block of wood or have someone "Buck" the end of it. A nail set makes a good drive pin.

    The pin you are working on is a sheer pin and should (it might be anything) be a soft 410 alloy stainless pin. If you have to drill it it should be easy to drill.

    Good luck with it and best regards,
    Frank_S
     
  9. noeettica

    noeettica Well-Known Member

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    you could pull the shaft from the lower and take it to a machine shop ....

    Dave