Jump to content
mikeeyre74

522xi / Kohler CH22s carb rich?

Recommended Posts

 In the final phases of my freshening up of the 522XI, and I took the carburetor apart to clean it out and try to get rid of the rough running issues.  After we assembly, it started right up and ran pretty good, idols nice and friends at wide-open throttle OK, but has a bit of a snort, pop &  backfiring audio track, and Rich running condition… You can smell the gas just blasting out the exhaust.  The only adjustment on the carburetor is the low speed idle screw, and the idle speed jet. Both of those things are fine… It's the high-end that I believe is the issue. How do you adjust for this? Or, if that's not the question, why is it running so rich and popping?

Share this post


Link to post
Share on other sites
Posted (edited)

What engine is in that? If it is the vtwin Kohler, i have found that when you pull the top off the carburetor there is a small tube(cant remember the name right away) that has very small o rings on it. These o-rings go bad and it sucks air and runs like crap. Only way to het them is in a carb kit. Not sure thats your issue but hope this might help. Ill try and find a picture 

IMG_5290.JPG

Edited by 19richie66
Added picture

Share this post


Link to post
Share on other sites

Kohler Command V Twins are notorious for bad ignition coils, I just had to replaced both of them on my CH22. Use a spark tester to see if both cylinders are firing as they should. Here's a good video

 

 

Share this post


Link to post
Share on other sites

My goodness, but the carb rebuild kits for these are expensive and you don't even get much for your money! Rats... I'll have to bite the bullet and do this thing I guess. 

Share this post


Link to post
Share on other sites
Kohler ch22

 

 So this is the carburetor on my machine, but this number "24 053" doesn't seem to exist in any catalogs or online that I can find?  There are several online and eBay etc. "24 737"  that look like exactly the right thing…  and they are listed for use in a CH22.  What gives with the different number? 

  • Excellent 1

Share this post


Link to post
Share on other sites

Took it back apart and this time rememberes to pull the main jet from underneath the solenoid. It runs better now, not quite so rich, but still the backfiring persists.

 

522xi runs rpigh

 

https://flic.kr/p/YiddvD

 

If that doesn't show as a video up there, here's a link instead. 

 

Mike

Share this post


Link to post
Share on other sites

Mike, my 522xi runs rich too.  I've been completely through the fuel system but not tore into the carb.  I have nothing to add or help but I hope you find out more and share!

Share this post


Link to post
Share on other sites

See the 24 053 43 first shows up on page 5.2

Suspect this manual would be easier to follow in printed form. (Two consecutive pages side by side)

Click on the picture.

Garry

Share this post


Link to post
Share on other sites
14 hours ago, DennisThornton said:

Mike, my 522xi runs rich too.  I've been completely through the fuel system but not tore into the carb.  I have nothing to add or help but I hope you find out more and share!

 

Dennis, for your  264H try what I do for my two gas engine 5xi. I read somewhere years ago that the Kohler CH has a tendency to run on when shutoff. Probably the early emission standards for small gas engines is the reason. Even after idling down they will sometimes backfire which is not good for the muffler. The cure was to advance the throttle simultaneously while turning the ignition off. You essentially flood the engine. This always works for me.

 

 

Edited by shallowwatersailor
  • Like 1
  • Thanks 1

Share this post


Link to post
Share on other sites
12 hours ago, gwest_ca said:

See the 24 053 43 first shows up on page 5.2

Suspect this manual would be easier to follow in printed form. (Two consecutive pages side by side)

Click on the picture.

Garry

All the manuals that I have I do NOT think I've EVEN seen this!

 

I've told you several times and I think it is generally known here but once again:

 

You're the best!

 

Isn't he?

 

Don't blush but seriously, you are a major asset here on this forum, worth the price of admission alone!  And I'm sure that some folks here don't know that you are actively doing the same on YaHoo!

 

Thanks for all your effortS!  This forum, heck the whole Wheel Horse following would not be the same without you!  SERIOUSLY!

 

THANK YOU!

  • Excellent 1

Share this post


Link to post
Share on other sites

See the 24 053 43 first shows up on page 5.2 to 5.8

The carb numbers can be on either side of the page.

Also noticed a complete carb is named a carb kit in Kohler language.

 

Garry

 

24 05 343-1 SS.jpg

24 05 343-2 SS.jpg

Share this post


Link to post
Share on other sites

 You are right! Although, this shows you the bits and pieces inside the carburetor, it isn't much help when it comes to diagnosing an issue.  But it is a foot in the door. That's good. 

 

 My two pack of spark testers should be arriving early this coming week, so I'll see with those things show me. That video that was posted above by another member was informative!  It would explain the rich running condition and popping problem. 

Share this post


Link to post
Share on other sites

This looks to be an easy problem to fix, but not cheap. The accelerator pump diaphragm has a hole in it. The engine sucks fuel thru the hole in the pump diaphragm into the engine causing it to run rich. 

 

Oh, is this another pissing contest?

Share this post


Link to post
Share on other sites

Can I diagnose this better by using an external gravity feed fuel tank and just not using the fuel pump? If that fixed my problem, will that point towards the fuel pump being my issue like mentioned just above? 

Share this post


Link to post
Share on other sites

 In either case, my spark tester it came in a little bit early, and arrived this morning in the mail. I just installed them and it took this video. 

 

Spark testers added

 The first bulb that you see is the left side bank, and is pretty much a steady glow.  When I move around to the other side of the tractor and video the right-hand bank, then you can see that it flickers quite a bit. I suspect,  based on what I know now from seeing the video that was posted previous to this, that this coil is shot. It also doesn't do it immediately but only after a few minutes of warm-up time. Then it backfires more and more. I will order a coil and install it. 

  • Like 1
  • Excellent 1

Share this post


Link to post
Share on other sites

 I have another gheead going where I already mentioned this, but figured I should mention it here in case you guys are following along… 

 

 I got the engine shroud off and found that there is one original coil and one replacement coil underneath the hood.  The resistance values on the coils according to the Kohler manual are all correct.  I did find the replacement coil had one wire that was not properly connected, it was jammed between the spade connector and the insulator, not properly connected on the spade connector itself.

 

522 coil investigation

 here I've pulled it off, but this is sort of how it was attached:

522 coil investigation

 It wasn't connected properly, it was just kind of being held down there by the insulation around the spade connector. 

 

 Also, the airgap is supposed to be measuring .011 to .013 of an inch on the coils, but it was measuring and only .005 inch.  The engine manual says that this is a critical measurement, but… Could it be that easy? 

 

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Recently Browsing   0 members

    No registered users viewing this page.

×