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  1. #11
    Mark you are correct. I am refering to peak speeds in smooth water. The pump extension will give you better hook up, I have noticed that my ski bounces much more than the other 1300 conversion that do not have the extension while cruising at lower speeds.

    Mine are staying in place. I am willing to sacrifice some top end for hook up!!!!


  2. #12
    Hydrotoys's Avatar
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    Quote Originally Posted by SUCKMYWAKE
    mark, do u remember the thread pitch for the adapters
    M6 1.25
    M5 1.25

    or I could be full of crap.

  3. #13
    There is no VooDoo like BadVooDoo NeVerMind's Avatar
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    Is the coupler and its washer really needed? I thought you can use the existing ones on your boat?

  4. #14
    Hydrotoys's Avatar
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    Nope, dont screw on the new shaft. Wrong size on the threads.

  5. #15
    Cajundude's Avatar
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    Whazzup guys, I'm trying to get caught up since I've been out several months. Are ya'll saying that this 2" spacer deal gives even more top speed than just the 05 pump alone? Thanks!

  6. #16
    mrbtd's Avatar
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    ttt for a good winter project

  7. #17
    Moderator RX951's Avatar
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    Good information, but I'm actually going the [no spacer] route on my conversion. I'll be running the 2002 shaft and pump/impeller/hull setup exactly as I had my GPR when it was running 76 mph.

    again, this is great information, not to thwart away, just my personal conversion will not have the extension for the initial build.

  8. #18
    Moderator OsideBill's Avatar
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    If you are going to do this mod I have 2" SST cable extensions available again.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  9. #19
    cmherrera's Avatar
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    thinking of doing.

    Is it worth the money to do this mod? What was your results?

  10. #20
    billy's gpr's Avatar
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    Quote Originally Posted by cmherrera View Post
    Is it worth the money to do this mod? What was your results?
    if i save a crank ,its money well spent don't you think

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