Results 1 to 10 of 10
  1. #1

    check valve carb help

    finally doing my carb rebuild and rejet ,what is the trick to replacing the check valves or are they left alone if you see no creases or defects - those rubber snubbers are a beast . On the primer block offs and "nozzle" what are most using to seal them in and do you remove the plastic inserts that were there for the choke shaft ?


  2. #2
    Moderator OsideBill's Avatar
    Join Date
    Mar 2006
    Location
    United States
    Posts
    11,875
    +1
    30
    Windex on the rubber, use a 2mm ball allen wrench to push it in. Do not force it use even pressure and it will go.

    I use JB weld or loctite gel, when I install the primer fittings and I leave the plastic pieces in.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Carb 045.jpg 
Views:	166 
Size:	1.03 MB 
ID:	180342   Click image for larger version. 

Name:	Carb 209.jpg 
Views:	190 
Size:	1.43 MB 
ID:	180343   Click image for larger version. 

Name:	Carb 210.jpg 
Views:	201 
Size:	1,000.1 KB 
ID:	180344   Click image for larger version. 

Name:	Carb 049.jpg 
Views:	154 
Size:	1,023.4 KB 
ID:	180355   Click image for larger version. 

Name:	Carb 050.jpg 
Views:	158 
Size:	1.00 MB 
ID:	180356  

  3. #3

    Thank you very much !

    The tips and the pics are fantastic ,a very big help as this is my first carb job on my ski

  4. #4
    1131 Adam E.'s Avatar
    Join Date
    Oct 2009
    Location
    Fort Bragg, NC
    Posts
    458
    +1
    3
    Quote Originally Posted by OsideBill View Post
    Windex on the rubber, use a 2mm ball allen wrench to push it in. Do not force it use even pressure and it will go.

    I use JB weld or loctite gel, when I install the primer fittings and I leave the plastic pieces in.
    Bill,

    I was doing another rebuild and the manual said to make sure the blue lines on the check valves are facing the pump side. What does this mean?

    Adam

    BTW Thanks for the carb parts they are a big help.Yyours are on the way.

  5. #5
    krispaintballz's Avatar
    Join Date
    Sep 2007
    Location
    Kenosha, WI
    Posts
    2,978
    Quote Originally Posted by Adam E. View Post
    Bill,

    I was doing another rebuild and the manual said to make sure the blue lines on the check valves are facing the pump side. What does this mean?

    Adam

    I have heard this many times. Some say the blue line is for a reason and others just say the blue lines are there so you can spot or see the clear disc. I put them in both ways with no troubles. I cannot speak for everyone else.

    I have also heard its the way it is cut and it has to be on a certain side. All the dics I have put on the pumps, the edges to too far from the metal rim to affect the sealing.

  6. #6
    Moderator OsideBill's Avatar
    Join Date
    Mar 2006
    Location
    United States
    Posts
    11,875
    +1
    30
    Quote Originally Posted by Adam E. View Post
    Bill,

    I was doing another rebuild and the manual said to make sure the blue lines on the check valves are facing the pump side. What does this mean?

    Adam

    BTW Thanks for the carb parts they are a big help.Yyours are on the way.
    I do as the manual states, always have. Look at the disk it has been marked with a line, the side it is marked on faces up away from the valve body.

    If you look in the pictures above those are from GPR carbs you see clearly there is a black line, if it was flipped it would appear more opaque. That one is being installed correctly.

  7. #7
    Moderator beerdart's Avatar
    Join Date
    Aug 2006
    Location
    CT
    Posts
    25,929
    +1
    1,407
    The line marks the outside curl of the roll it was stamped from.

  8. #8
    Moderator OsideBill's Avatar
    Join Date
    Mar 2006
    Location
    United States
    Posts
    11,875
    +1
    30
    Quote Originally Posted by beerdart View Post
    The line marks the outside curl of the roll it was stamped from.
    exactly

  9. #9
    Moderator OsideBill's Avatar
    Join Date
    Mar 2006
    Location
    United States
    Posts
    11,875
    +1
    30
    I wish to put the on going discussion of which way the ink mark on the check valve goes and why it is there to bed. I finally found an old Mikuni instruction sheet in the shop, this used to come printed on the back of the parts diagram.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Mikuni Chk Vlv inst.jpg 
Views:	639 
Size:	487.8 KB 
ID:	183471  

  10. #10
    krispaintballz's Avatar
    Join Date
    Sep 2007
    Location
    Kenosha, WI
    Posts
    2,978
    Good stuff Bill. Guess I am going to be more careful now. Didnt really think it mattered. Good find!

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Mikuni Carb Fuel Pump Check Valve Install
    By OsideBill in forum Yamaha How To & FAQs
    Replies: 9
    Last Post: 08-17-2015, 09:33 PM
  2. 99gsx ltd carb accelerator pump/ check valve where to buy?
    By wildcat530 in forum 2-Stroke Performance
    Replies: 0
    Last Post: 05-04-2012, 05:28 PM
  3. Where to buy carb check valve grommets?
    By DKFox in forum 2-Stroke Performance
    Replies: 9
    Last Post: 06-23-2010, 10:49 AM
  4. carb check valve install
    By jeff12pv in forum Yamaha PWC Performance (2-stroke)
    Replies: 3
    Last Post: 06-18-2010, 08:37 PM
  5. Question reguarding mark on new carb check valve
    By mrtinker in forum Yamaha How To & FAQs
    Replies: 2
    Last Post: 07-25-2009, 10:25 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
  •