Results 1 to 8 of 8
  1. #1

    Join Date
    Jul 2008
    Location
    cold spring NY
    Posts
    58

    150 speedster lost speed?

    last year on the GPS i was geting 56-58 going with the wind on a stock boat over the winter i did riva washers, intake, blow off valve, catch can, solas 14/19 impeller and a new wear ring i GPS it today and was only geting 53-54 i was hopeing to get 58-59 WTF


  2. #2
    Tiny's Avatar
    Join Date
    Sep 2006
    Location
    The Atl
    Posts
    3,561
    +1
    578
    dumb question.....

    did you test the slip point of the wasjers to make sure you didnt need shims?

    Did you "break in" the new washers?

    How did you select that prop? was it recommended? I dont have any recommendations for a prop but just curious how you went about getting that one?

  3. #3

    Join Date
    Jul 2008
    Location
    cold spring NY
    Posts
    58
    how do u check the slip? and the 14/19 prop i asked on here and a few people said thats a good one to get with little mods

  4. #4
    Tiny's Avatar
    Join Date
    Sep 2006
    Location
    The Atl
    Posts
    3,561
    +1
    578
    clutch slipage is checked on the bench using a torque wrench. the SC must come off the boat. You will also need the special tools for holding the sc in a vise

  5. #5
    Vern's Avatar
    Join Date
    May 2005
    Location
    Grand Haven, MI
    Posts
    3,594
    +1
    128
    What rpms are you turning at full throttle?

  6. #6

    Join Date
    Jul 2008
    Location
    cold spring NY
    Posts
    58
    7650/7700rpms the water temp is 70

  7. #7
    TheElite0ne's Avatar
    Join Date
    Jan 2009
    Location
    Tampa, FL
    Posts
    383
    +1
    20
    Quote Originally Posted by john12 View Post
    7650/7700rpms the water temp is 70
    what were your RPM's last year before the mods? prop may be to big.

    The only power mods you did was the intake correct? You shouldn't need a new prop if thats all you did. I would put the old prop back on and see where that puts you.

  8. #8

    Join Date
    Jul 2008
    Location
    cold spring NY
    Posts
    58
    i just put in a rive gen2 impeller rpm were at 7900-8000 got 68mph and once saw 59.5mph on the GPS it must of ben the 14/19 prop was to tall the sc impeller was all it needed. what should my next mod be?

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Stock speed of 150 Speedster 155HP
    By guduf4u in forum Sea Doo Sport Boats
    Replies: 2
    Last Post: 09-18-2007, 05:35 PM
  2. Replies: 12
    Last Post: 07-28-2007, 09:09 AM
  3. Lost speed sensor wheel!
    By Minx20 in forum Yamaha PWC Performance (2-stroke)
    Replies: 4
    Last Post: 04-17-2007, 09:56 PM
  4. Lightened my hull... lost speed!
    By 05Limited in forum Sea Doo Open Discussion
    Replies: 7
    Last Post: 09-29-2006, 01:02 PM
  5. Found cause of lost speed
    By Sundance in forum 4-Tec Performance
    Replies: 3
    Last Post: 12-10-2005, 06:39 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
  •