Results 1 to 5 of 5
  1. #1
    thompsdw's Avatar
    Join Date
    Sep 2007
    Location
    Richmond, VA
    Posts
    880
    +1
    1

    Sealing Pump on 4-Tec

    Well - I opened my cone on my 4-Tec for the very first time. No signs of water contamination at all. Should I change the o-rings, or simply button the cone back up with a little 518?

    I have heard some talk about pressure testing the pump, however, I am not sure how to do that. There are no fittings to pressure test on a late model 4-Tec. How would you accomplish that task?


  2. #2
    Quote Originally Posted by thompsdw View Post
    Well - I opened my cone on my 4-Tec for the very first time. No signs of water contamination at all. Should I change the o-rings, or simply button the cone back up with a little 518?

    I have heard some talk about pressure testing the pump, however, I am not sure how to do that. There are no fittings to pressure test on a late model 4-Tec. How would you accomplish that task?
    I think it is a special tool, a cone with a fitting for one of those hand type pumps, supposed to sit at a certain pressure for a few minutes...PR...

  3. #3
    thompsdw's Avatar
    Join Date
    Sep 2007
    Location
    Richmond, VA
    Posts
    880
    +1
    1
    So, that would only test the one side and not the cone seal itself - I am wondering if it is better to just change the o-rings, hit it with 518 and hope for the best.

  4. #4
    AKA: Larry lafjax's Avatar
    Join Date
    Jul 2006
    Location
    Jacksonville, Fl
    Posts
    3,032
    Quote Originally Posted by thompsdw View Post
    So, that would only test the one side and not the cone seal itself - I am wondering if it is better to just change the o-rings, hit it with 518 and hope for the best.
    I had to replace my o-rings after the cone off about 10 times. It's a cheap thing and if you have any reservations just replace them. Personally I think you could get by without replacing now.

  5. #5
    Quote Originally Posted by thompsdw View Post
    So, that would only test the one side and not the cone seal itself - I am wondering if it is better to just change the o-rings, hit it with 518 and hope for the best.
    true: it test the seals behind the impeller...PR...

    on the 2 stroke pumps they use the oil fill plug as the port to pressure test...

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. 4-tec Pump on an FZR
    By MPower in forum Yamaha PWC Performance (4-stroke)
    Replies: 30
    Last Post: 08-26-2009, 07:47 AM
  2. Broken vent barb on 4-tec fuel pump
    By mrbtd in forum 4-Tec Performance
    Replies: 31
    Last Post: 10-29-2008, 09:44 AM
  3. tips on removing a sealed pump shoe????
    By izz0 in forum Yamaha How To & FAQs
    Replies: 4
    Last Post: 08-07-2008, 01:31 PM
  4. 4-tec pump on gsxl '98
    By jetcar123 in forum 2-Stroke Performance
    Replies: 5
    Last Post: 12-13-2007, 01:05 AM
  5. just ordered wear ring and pump seal. tips on install
    By TDSTYG in forum 4-Tec Performance
    Replies: 11
    Last Post: 08-26-2007, 04:09 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
  •