Results 1 to 10 of 10
  1. #1

    How many hours is the carbon ring good for?

    05 Rxp with 130 ish hours on it. How many hours are most getting out of the carbon ring and boot. Getting slight cavitation out of the hole. I notice the carbon ring does deteriorate and spray carbon dust around the area. Will have the pump and sc'r out today, so now is the time.

    Also, is it wise to replace the flywheel bolts at this time? Without looking at the teardown manual, is this a relatively easy task and what parts, gaskets, bolts, etc., will be required?

    Thanks,

    Mark


  2. #2
    Site Admin Green Hulk's Avatar
    Join Date
    Apr 2005
    Location
    Morgan City, LA
    Posts
    36,398
    +1
    2,524
    Mark, it's a good idea to replace the carbon seal every 100 hours.

    To replace the crankshaft bolts you need to remove the PTO housing. It's not too hard of a job but it's best done with the engine out of the ski and on a stand.

  3. #3
    daverxp4's Avatar
    Join Date
    Aug 2005
    Location
    montreal,canada
    Posts
    1,323
    Quote Originally Posted by Green Hulk View Post
    Mark, it's a good idea to replace the carbon seal every 100 hours.

    To replace the crankshaft bolts you need to remove the PTO housing. It's not too hard of a job but it's best done with the engine out of the ski and on a stand.
    i have over 300 on carbon seal do we must remove motor for upgrade bolts how many hours roughly of a job by a mechanic aproximate?

  4. #4
    Site Admin Green Hulk's Avatar
    Join Date
    Apr 2005
    Location
    Morgan City, LA
    Posts
    36,398
    +1
    2,524
    Dave, it's the 04-05 RXP's that had weak flywheel bolts. If you ever have the engine out for anything its a good idea to replace them with the 06+ stretch bolts
    http://greenhulk.net/forums/showthread.php?t=15566

  5. #5
    Jerry:

    Are you saying a flywheel bolt failure is a low percentage failure and not to be too concerned unless you're pulling the engine? I have been told when changing the carbon seal you can put a thick O-ring between the rear of the boot and the flat spot on the fiberglass to put more pressure on the seal so it's less likely to suck air on take-off. Anyone doing this?

    Mark

  6. #6
    suck my wake's Avatar
    Join Date
    Apr 2006
    Location
    Sugar Grove IL
    Posts
    2,872
    +1
    12
    Quote Originally Posted by Mark S View Post
    Jerry:

    Are you saying a flywheel bolt failure is a low percentage failure and not to be too concerned unless you're pulling the engine? I have been told when changing the carbon seal you can put a thick O-ring between the rear of the boot and the flat spot on the fiberglass to put more pressure on the seal so it's less likely to suck air on take-off. Anyone doing this?

    Mark
    I have seen this type of failure and believe me you don't want that to happen to you. Change those bolts! You dont really need to pull the motor to do it, its just easier but not nessessary. I have also heard of "shimming the carbon seal" to put more pressure on it, I am told it works but have not tried it myself. I was going to this year after I put my new one in.

  7. #7
    daverxp4's Avatar
    Join Date
    Aug 2005
    Location
    montreal,canada
    Posts
    1,323
    i remember asking you about these a while back, but now with more mods, and guarantee almost done, machine will have more torque and hp but no ecu changes yet for now too bad its not easier to do with the engine inside the hull...i keep everything bling in there as much as i can

    i will try not to panic.

  8. #8
    daverxp4's Avatar
    Join Date
    Aug 2005
    Location
    montreal,canada
    Posts
    1,323
    Where is psycho rxp i know he has tons of hours on his 04 rxp...

  9. #9
    Quote Originally Posted by suck my wake View Post
    I have seen this type of failure and believe me you don't want that to happen to you. Change those bolts! You dont really need to pull the motor to do it, its just easier but not nessessary. I have also heard of "shimming the carbon seal" to put more pressure on it, I am told it works but have not tried it myself. I was going to this year after I put my new one in.
    I'm going to change oil in the ski today and pull the pump, sc'r, etc. I'll check the teardown manual. If you have done this, should I leave the pump in until I break the bolts on the flywheel loose?

    Mark

  10. #10
    captain obvious Lurker's Avatar
    Join Date
    Jul 2005
    Location
    Visalia, Ca
    Posts
    2,316
    The pump does need to come out because the driveshaft needs to be removed.

    Those bolts went on mine with less than 50 hours, and I'm not really modded. I've basically got the old riva stage 2.

    It will cost you about 25 bucks for the bolts, a gasket, and (depending on how familiar with the ski) anywhere between 4-8 hours. to upgrade the bolts.

    In my case here is the parts list when those bolts broke:

    420819078 - crankshaft
    420250055 - O – Ring – QTY=2
    420631310 - O – Ring – QTY=2
    420238300 – spring Disk – QTY=2
    420827261 – Thrust Washer – QTY=1
    420889772 – Engine Gasket Set – QTY=1
    420956762 – Oil Pamp Housing – QTY=1
    420837543 – Pump Shaft Assy – QTY=1
    420956675 – Outer Rotor 16 mm - QTY=1
    420811850 – Oil Pamp Cover – QTY=1
    420256570 – Oil Sieve – QTY=1
    420811579 – TIMING/DRIVE COVER ASSY ICLUDES 1 TO 6 – QTY=1
    420956950 - Oil Sieve – QTY=1
    420837472 – Oil Pump Shaft Assy – QTY=1
    420956675 - Outer Rotor 16 mm -QTY=1
    420929070 – Needle Pin – QTY=2
    420811590 - Oil Pamp Cover – QTY=1
    420889720 – Stator Assy – QTY=1
    420889710 – Magneto Flywheel Assy – QTY=1
    420664140 – Crankshaft Sensor – QTY=1
    420664080/ 420664082 – Pick-up Gear, 36 Teeth – QTY=1
    420931130 – Gasket – QTY=1
    420832648 – Ball Bearing 42 to 43 – QTY=1
    271001328 – Spring – QTY=1
    420929650 – Drive Pin 5х10 – QTY=1
    420933455 – Plain Bearing Half – QTY=4
    420933465 - Plain Bearing Half – QTY=4
    420933475 – RING Half – QTY=2
    420933440 – plain Bearing Half – QTY=4
    420933470 – Ring Half – QTY=2
    420630550 – Sealing Ring – QTY=1
    420640990 – Connecting Rod Screw – QTY=6
    420933520 – Plain Bearing – QTY=6
    420950770 – Cylinder Head Gasket – QTY=1

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. how many hours is too many?
    By hunter0527 in forum 2-Stroke Performance
    Replies: 2
    Last Post: 03-06-2009, 09:37 AM
  2. how many hours is too many for rxp sc
    By abarrassr07 in forum Sea Doo Open Discussion
    Replies: 8
    Last Post: 03-02-2009, 10:15 AM
  3. How many hours is ALOT
    By Stoffa17 in forum Yamaha PWC Performance (2-stroke)
    Replies: 7
    Last Post: 06-05-2008, 02:43 PM
  4. How many hours is too much?
    By Rampage in forum 4-Tec Performance
    Replies: 9
    Last Post: 02-08-2008, 05:51 PM
  5. How many hours until you replace rings? Also Cat converter broken...
    By RUNWME in forum Yamaha PWC Performance (2-stroke)
    Replies: 12
    Last Post: 10-11-2007, 09:01 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
  •