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Thread: Magnum pump 15F

  1. #1

    Magnum pump 15F

    Hello,

    I have a Kawasaki 15Fde 2005, I installed it:
    -RIVA Kit RK1000-15F (Camshaft, Piston, ECU), I have a compression ratio of 12 / 1, because-as my fuel is unleaded 98.
    -Skat-Trak Magnum pump set-back version of 148 mm with impeller 15/22 (supplied with the magnum).
    -Nozzle Skat-Trak auto trim nozzle & kit ring interchangeable( 83 & 86mm outlet).
    -R&D intake grate.
    -Ride plate is original, with the pads back-2mm.
    -Free Flow Exhaust Kit.
    -First water box modified
    -Riva Power Filter Kit.

    My problem is that when I'm stopped and I put gas, the engine is 8000 rpm and I is not moving, then as soon as I started so good. In the calm sea gps 97km / h.
    I controlled the gap between impeller and casing result 0.4mm. Ok impeller.
    What is the problem??
    Thank you in advance.
    Cordially.

    Cédric G.


  2. #2
    Fat Man, Little Boat Region8Ultra250X's Avatar
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    cavitation.... is the pump sealed properly? whats the gap between the prop and pump housing supposed to be

  3. #3
    Take the time to smile sirbreaksalot's Avatar
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    Quote Originally Posted by SuperStock View Post
    Hello,

    I have a Kawasaki 15Fde 2005, I installed it:
    -RIVA Kit RK1000-15F (Camshaft, Piston, ECU), I have a compression ratio of 12 / 1, because-as my fuel is unleaded 98.
    -Skat-Trak Magnum pump set-back version of 148 mm with impeller 15/22 (supplied with the magnum).
    -Nozzle Skat-Trak auto trim nozzle & kit ring interchangeable( 83 & 86mm outlet).
    -R&D intake grate.
    -Ride plate is original, with the pads back-2mm.
    -Free Flow Exhaust Kit.
    -First water box modified
    -Riva Power Filter Kit.

    My problem is that when I'm stopped and I put gas, the engine is 8000 rpm and I is not moving, then as soon as I started so good. In the calm sea gps 97km / h.
    I controlled the gap between impeller and casing result 0.4mm. Ok impeller.
    What is the problem??
    Thank you in advance.
    Cordially.

    Cédric G.
    .4 mm = 020 tho , This is way to much
    003 thou is nice and tight

    get your prop rebuilt

    Waz

  4. #4
    Thank you guys!
    For cavitation, I thought.
    And, for the gap is all new!
    I was thinking more a problem impeller.
    What do you think?

  5. #5
    They advised me a 17/23.
    But its seem to me very long

  6. #6
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    What did you do to drop the compression down? I am running 12 to 1 with my zx pistons.

    Sean

  7. #7
    I have corrected my piston by a pro.
    He corrected the piston head by calculating the volumetric ratio.
    Sorry, but I don't know how he did!

  8. #8
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    Quote Originally Posted by SuperStock View Post
    I have corrected my piston by a pro.
    He corrected the piston head by calculating the volumetric ratio.
    Sorry, but I don't know how he did!

  9. #9

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