Results 1 to 7 of 7
  1. #1
    1BAD07RXP's Avatar
    Join Date
    Jun 2007
    Location
    Chesapeake Bay, South River, Edgewater, MD
    Posts
    105

    Need Help GPS speeds are down

    Ok so I just got my gps and i have stage 1 plus bov, green wheel and reverse bucket mod. Water 87 Air 90
    First Run 70.8
    Second Run 70.4
    Third Run 71.1 (superman)

    rpms 8160-8180

    All my stage 1 kit is out of the box including the 14/19r prop


  2. #2
    JFizzleJR's Avatar
    Join Date
    Aug 2005
    Location
    FL
    Posts
    8,628
    +1
    808
    so your gps speeds are down..in comparison to what??

  3. #3
    1BAD07RXP's Avatar
    Join Date
    Jun 2007
    Location
    Chesapeake Bay, South River, Edgewater, MD
    Posts
    105
    i see everyone else on the forum running 68-69 bone stock. I think something is wrong.

  4. #4

    rpm

    you should pitch your prop some to take away some rpm you are turning too much.......
    you will go faster at 8100 than at 8180


  5. #5
    JFizzleJR's Avatar
    Join Date
    Aug 2005
    Location
    FL
    Posts
    8,628
    +1
    808
    do you have stock numbers to go by? do you have other gps numbers from a different day with your current mods that yielded better results?
    how many hours on your ski?
    maybe you should try adding a mm of pitch to your prop
    a stage I + green wheel should in regular cases require 1-1.5mm added to it

  6. #6
    1BAD07RXP's Avatar
    Join Date
    Jun 2007
    Location
    Chesapeake Bay, South River, Edgewater, MD
    Posts
    105
    i have 50 hours on it and i just noticed my stock wear ring has about a 1/32" or 1/16" groove worn in it. maybe a ss wear ring and a pitch would do the trick

  7. #7
    JFizzleJR's Avatar
    Join Date
    Aug 2005
    Location
    FL
    Posts
    8,628
    +1
    808
    flip the wear ring and check your rpms. then if they are higher (which they will be if the ring is worn) you will have to pitch
    good luck

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Need Help !!!!!!!! GP 1200
    By edoverdrive in forum Yamaha PWC Performance (2-stroke)
    Replies: 3
    Last Post: 10-06-2011, 06:01 PM
  2. Need Help Locating Transom Tie Down Strap Loop
    By jason78 in forum Towing and Trailers
    Replies: 3
    Last Post: 08-16-2011, 01:29 AM
  3. Need Help Wake Edition way down on power?
    By Fly'n Dutchman in forum 4-Tec Performance
    Replies: 10
    Last Post: 08-12-2007, 08:45 AM
  4. !!Need help for SPEED!!
    By Chezzy in forum Yamaha PWC Performance (2-stroke)
    Replies: 4
    Last Post: 12-24-2006, 03:17 PM
  5. NEED HELP URGENT(HULK) RXP DOWN
    By macattack in forum 4-Tec Performance
    Replies: 28
    Last Post: 11-22-2005, 02:39 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •