Page 1 of 2 12 LastLast
Results 1 to 10 of 12
  1. #1

    ISC/IAC motor o-ring install - HELP!!

    Stupid question #101 - how do you reinstall the rubber o-ring on the ISC stepper motor? We are replacing our ISC motor to fix the low idle stalling issue, and everything was going smoothly until we went to install the o-ring. I removed the old one and saw exactly how it fit on the old ISC motor, but now when I go to reinstall it, it's like it's just an eighth of an inch too large and won't fit the channel on the motor housing anymore. I'm going to run up to our local Kawasaki dealer tomorrow to see if they have a new o-ring in stock to see if that's maybe the issue, but I'm concerned it takes a special tool or something to get it back into the channel again.

    Any help or advice would be GREATLY appreciated!

  2. #2

    Join Date
    May 2008
    Location
    Sweetwater
    Posts
    1,015
    +1
    163
    Quote Originally Posted by stevenk2 View Post
    Stupid question #101 - how do you reinstall the rubber o-ring on the ISC stepper motor? We are replacing our ISC motor to fix the low idle stalling issue, and everything was going smoothly until we went to install the o-ring. I removed the old one and saw exactly how it fit on the old ISC motor, but now when I go to reinstall it, it's like it's just an eighth of an inch too large and won't fit the channel on the motor housing anymore. I'm going to run up to our local Kawasaki dealer tomorrow to see if they have a new o-ring in stock to see if that's maybe the issue, but I'm concerned it takes a special tool or something to get it back into the channel again.

    Any help or advice would be GREATLY appreciated!


    When it gets taken out it swells up, and gets even worse if gets in contact with carb/brake cleaner if you are cleaning the surface.

    You can try using grease to stick it back into the groove which sometimes works but what it really needs is a new seal. You can also slice a piece out to shorten it a bit so it fits better but a new one is the permanent fix.

  3. #3
    Thanks, Rescue1! I figured a new o-ring would probably be the solution - my son is running the ISC and original seal up to the dealer today to see if they have a new one in stock and/or if they can get the original back into the groove. We had considered cutting out a small slice of the original yesterday when we were working on it, but I'd heard that you want to make sure the ISC is airtight, otherwise you might get spurious readings with the ECU that could cause additional issues at idle (and otherwise). Best case scenario sounds like getting a new o-ring, so that's what we'll go for.

  4. #4
    My son just got back from the dealership, and they don't have the o-ring, but gave him a part number to look up. Unfortunately, it looks like the number they gave him is actually for the throttle body o-ring and not the one for the IAC o-ring (P/N 92055-3773). I looked up a couple of exploded parts diagrams online, and none of them appear to have the ISC o-ring pictured. I'm thinking that I may just need to try to reuse the one I have and just make it work somehow. Kinda silly how a little 25-cent piece of rubber is holding up getting the thing put back together and running again.

    If I'm unable to get the original to work again, is there any other option but to cut it to fit? Can you seal it with some kind of form-a-gasket from a tube or RTV or something like that?

  5. #5

    Join Date
    May 2008
    Location
    Sweetwater
    Posts
    1,015
    +1
    163
    Quote Originally Posted by stevenk2 View Post
    My son just got back from the dealership, and they don't have the o-ring, but gave him a part number to look up. Unfortunately, it looks like the number they gave him is actually for the throttle body o-ring and not the one for the IAC o-ring (P/N 92055-3773). I looked up a couple of exploded parts diagrams online, and none of them appear to have the ISC o-ring pictured. I'm thinking that I may just need to try to reuse the one I have and just make it work somehow. Kinda silly how a little 25-cent piece of rubber is holding up getting the thing put back together and running again.

    If I'm unable to get the original to work again, is there any other option but to cut it to fit? Can you seal it with some kind of form-a-gasket from a tube or RTV or something like that?

    Did you try using grease in the grooves to help “stick” it in?

    Some ultra gray may work but at that point slicing a piece off or each length will be less messy and get ya up and running. Then go through the greenhulk store or I use Riva and order the part then change it another time.


  6. #6
    I'll try some grease first to see if I can get that to work. Is there any special kind I need to use in this application, or really any automotive-grade stuff will work?

    Quote Originally Posted by Rescue1 View Post
    Then go through the greenhulk store or I use Riva and order the part then change it another time.
    The issue is that even in the exploded parts diagrams I am seeing online (including on Riva's site), none of them have an o-ring pictured as a separate part with a part number. The only thing I can figure is that when you purchase the ISC new directly from Kawasaki, the o-ring comes preinstalled with it. This particular replacement ISC I purchased was used, so it did not come with the o-ring.

  7. #7
    Quick update on all of this - we were wholly unsuccessful in locating a replacement o-ring, nobody seems to even have a part number for it. I went ahead and tried some of the suggestions for getting the original to fit, but in the end I ended up trimming the excess length (slowly & carefully, only trimming very tiny pieces until it fit perfectly with no gap) to get it to fit properly. Reinstalled the ISC and plugged it back into the wiring harness, engine fired right up and settled right down to normal idle speed with no issues. We'll likely be out on the water tomorrow to fully test it under normal operating loads, but I expect it's fixed now and we won't have any further issues.

    Thanks to everyone for all of the advice and suggestions!!

  8. +1 by:


  9. #8

    Join Date
    May 2008
    Location
    Sweetwater
    Posts
    1,015
    +1
    163
    Your fix should work fine, But if you still want to swap out the O-Ring it’s easy and cheap enough. Here is a link with the part number in the description...

    https://www.partzilla.com/product/ka...hoCdzEQAvD_BwE

  10. #9
    Thanks again, Rescue1 - I'll continue to search for the o-ring replacement, but be aware that 92055-3773 is not the correct part number for this. Here's an exploded parts diagram from Kawasaki - the ISC/IAC motor is p/n 21174, and the o-ring fits into a channel on the body/flange of the ISC that seats to the metal housing that's bolted to the throttle body. Part number 92055A (as shown in the diagram, likely the same p/n as 92055-3773 that you referenced) is the throttle body gasket that the entire assembled ISC sits on to seal it to the throttle body. The ISC o-ring is a simple circular flat rubber gasket.



    I'm hoping that our fix works, since it appears to be impossible to purchase just the o-ring as a separate part, and I really didn't want to spend nearly $200 for a brand-new ISC with the o-ring pre-installed (assuming that's what the deal is, anyways). Plan B would be to try to hunt down a generic flat-style o-ring with the proper diameter; Plan C would be to run a bead of Permatex (or RTV or something similar) in that channel on the ISC and just seal it up that way. I would assume that the end game is to just find something that creates an air-tight seal to prevent air leaks under load that could give the ECU false readings and affect the engine running properly at idle (or otherwise).
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	ISC.jpg 
Views:	61 
Size:	72.1 KB 
ID:	450586  

  11. #10

    Join Date
    May 2008
    Location
    Sweetwater
    Posts
    1,015
    +1
    163
    Apologies sir, I thought you meant the other gasket which does the same thing. I had a spare, likely non working solenoid in my parts bin and took it out before in hopes of sending you a working rubber O-ring, but as soon as I pulled it out it expanded..

    But really I think cutting a small section out is the way to go and you shouldn't have any issues.

Page 1 of 2 12 LastLast

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Part number for IAC on 15f?
    By salvage101 in forum Kawasaki How To & FAQs
    Replies: 2
    Last Post: 05-29-2019, 05:00 AM
  2. Iac step motor replacement 2007 Honda Aquatrax
    By kauaiguy in forum Honda How To & FAQs
    Replies: 0
    Last Post: 03-23-2019, 11:26 PM
  3. WTB - Parts In need of a current IAC valve
    By IM2FAST4U in forum Kawasaki Classifieds
    Replies: 3
    Last Post: 01-11-2019, 06:40 PM
  4. IAC motor
    By scote620 in forum Kawasaki PWC Performance (4-stroke)
    Replies: 7
    Last Post: 11-14-2018, 11:22 PM
  5. Ultra 250x isc question
    By ski33 in forum Kawasaki PWC Performance (4-stroke)
    Replies: 14
    Last Post: 07-31-2013, 05:34 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
  •