Page 1 of 2 1 2 LastLast
Results 1 to 10 of 11
  1. #1
    Overcenter76's Avatar
    Join Date
    Aug 2009
    Location
    St. Cloud, Florida
    Posts
    18

    Stripped Drive Shaft and Impeller

    The Back Story:
    A few months ago I replaced the ware ring on one of my RXPs after it was ridden at WOT in less than 18 of water. The ring to impeller gap was over .060 and the impeller was bent up as much as 10mm on the trailing edge on two of the blades. I installed the new ware ring and straitened the blades. I also noticed the damage to some of the fins on the pump shoe at the time of the repair; however, I decided to let the damaged shoe ride as this is the guest ski. The repair went smooth as glass; I put the ski back into the lake and took it out for a spin. It preformed much better, but still not as strong as the ski I ride. A week ago, my wife tells me the ski feels slow off the line, I immediately new there was a problem because she is super timid when she rides. I pulled the ski out and found the impeller and drive shaft stripped, as seen in these photos.




    I have inspected the motor mounts and they are all fine. The wear on the drive shaft runs the length of the spines. My only guess is something got wedge in the impeller weakening the spines to the point they could strip out. To be honest, I have never seen a splined shaft do this. I have broken output shafts of the gear box of my 240, broken the splined stubs off the drive axles of an M3, but I have never seen spines strip like this. Has anyone else seen this or had this happen to them.

    I have gotten a drive shaft and an impeller is there anything else I should be looking for.


  2. #2
    Kaybat's Avatar
    Join Date
    Aug 2005
    Location
    Fl
    Posts
    1,735
    +1
    28
    holy crap
    I can't see how any kind of obstruction could have caused that...my guess is you weakened the splenes when you originally trashed it??

  3. #3
    SPEED COMES 1/10 @ A TIME SpeedFreeks Racing's Avatar
    Join Date
    Jun 2007
    Location
    BROOKLYN N.Y.
    Posts
    407
    +1
    1

    stripped splines....

    i have seen this happen 2 times before only when the pump bolts were either loose or not thighend enough.

  4. #4
    speedskixp's Avatar
    Join Date
    Feb 2008
    Location
    venice fl.
    Posts
    8,117
    +1
    120
    I've seen it a couple times and it ussualy starts with a stock prop getting stripped and then it takes out the shaft.

  5. #5
    Booner76's Avatar
    Join Date
    Oct 2009
    Location
    Stirling ,Ont.
    Posts
    222
    +1
    5
    Wondering if there might have been a big piece of wood ,rock etc. at WOT causing sudden jam.
    Only time I have ever seen something like that was a close ratio 5 speed out put flang on a Getrag tranny (BMW) I aquired. Spline damage looked the same as your pic.
    Even that had me puzzled.

    my 2 cents.....

  6. #6
    jpeconsult's Avatar
    Join Date
    Jul 2007
    Location
    Pineville, LA
    Posts
    5,448
    +1
    1
    IF the prop was on a spline tool when you straightened the blades, maybe it is possible the prop was not properly seated on the spline tool and stripped when working on the blades.

    +1 with Erik...Maybe the pump bolts were loose. I know with my ski, I often have to wiggle the pump to make sure the pump and gasket seat flush on the shoe. --J

  7. #7
    Overcenter76's Avatar
    Join Date
    Aug 2009
    Location
    St. Cloud, Florida
    Posts
    18
    Thank for the input guys, the pump bolts where tight and the impeller was not on the the spline tool when I trued it up.

    My plan so far is to replace the impeller, drive shaft, impeller bearing and the carbon seal. Anything else I should inspect or replace while I'm at it?

  8. #8
    Work Harder, Millions on Wellfare Depend On Us! ultramaxracing05's Avatar
    Join Date
    Aug 2009
    Location
    Beaumont, Texas
    Posts
    2,999
    +1
    123
    cut those plastic fins off, they are useless. plus you dont want them breaking and jamming on your impeller.

  9. #9
    speedskixp's Avatar
    Join Date
    Feb 2008
    Location
    venice fl.
    Posts
    8,117
    +1
    120
    Quote Originally Posted by Overcenter76 View Post
    Thank for the input guys, the pump bolts where tight and the impeller was not on the the spline tool when I trued it up.

    My plan so far is to replace the impeller, drive shaft, impeller bearing and the carbon seal. Anything else I should inspect or replace while I'm at it?
    You need to check your engine alignment.

  10. #10
    Overcenter76's Avatar
    Join Date
    Aug 2009
    Location
    St. Cloud, Florida
    Posts
    18
    Quote Originally Posted by speedskixp View Post
    You need to check your engine alignment.
    I checked the engine position in this ski versus my other RXP and they in the same position. Is there any other way to check the alignment in a more empirical manner? After inspecting the impeller closer it seems that was where the splines let go first. Either I reassembled it incorrectly or whatever debris hit the impeller caused the splines to weaken.

    I have picked up a used driveshaft and a Solas 14/19 impeller from Green Hulk members. I'm going to take the stock impeller of my ski and put it on this one. Repair one ski and get to modify my ski, I guess thing could be worse.

Page 1 of 2 1 2 LastLast

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Drive shaft and impeller corrosion?
    By JordanF in forum Sea Doo Open Discussion
    Replies: 0
    Last Post: 07-28-2015, 07:00 PM
  2. Sheared drive shaft and impeller
    By skysurfer2010 in forum 4-Tec Performance
    Replies: 4
    Last Post: 08-21-2014, 02:19 PM
  3. WTB Rxpx drive shaft and impeller
    By monaroman76 in forum Sea Doo Classifieds
    Replies: 9
    Last Post: 01-05-2012, 01:53 AM
  4. WTB '99 GP800 Drive shaft AND Impeller ASAP!
    By ProXR 440 in forum Yamaha Classifieds
    Replies: 4
    Last Post: 07-16-2008, 05:47 PM
  5. Will Virage drive shafts and impellers work on 750 hull from 94?
    By JGringo in forum Polaris Open Discussion
    Replies: 14
    Last Post: 08-18-2007, 12:47 AM

Posting Permissions

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