Kohler w/Walbro Carb leaking fuel

Reply

  #1  
Old 10-05-06, 01:44 PM
Member
Thread Starter
Join Date: Oct 2006
Posts: 6
Kohler w/Walbro Carb leaking fuel

Simplicity, Kohler 14hp CV14S, with Walbro LMK carb

Leaking fuel after shutdown. Bought repair kit, replaced needle valve, float is OK, fuel tank is not pressurizing, blew out fuel lines and carb with compressed air to remove any debris, new fuel filter.

Kohler tech support says to use a valve lapping compound to make sure no pitting has occured in brass seat. Sometimes it works, maybe not and have to buy new carb.

I have tried everything and still problem exists. Am I going to have to buy a new carb? Can valve seat be replaced?

Thanks
 
Sponsored Links
  #2  
Old 10-05-06, 02:47 PM
puey61's Avatar
Member
Join Date: Apr 2004
Location: Upstate New York
Posts: 3,224
Be sure the bowl vent is unobstructed. If this is OK and the carburetor does not have a replacable inlet seat then good luck with the grinding compound, I've never had this work favorably. But, it's always worth a try since the only option left is to replace the carb. Post back with the engines' specification number.
 
  #3  
Old 10-05-06, 03:17 PM
Member
Thread Starter
Join Date: Oct 2006
Posts: 6
Engine spec # is 14107

Where is the bowl vent?
 
  #4  
Old 10-06-06, 12:01 AM
cheese's Avatar
Forum Topic Moderator
Join Date: Jul 2001
Location: USA
Posts: 16,815
I think the vent is under a welch plug and vents to the throat of the carb on this. The vent could be an issue, but not as likely as the seat. I have had success using polishing compound and a Q-tip. I dip the Q-tip in turtle wax polishing compound (in the red container similar to the paste wax in the green tub), put the Q-tip in a drill, and use it to polish the seat area...with light pressure to get the contact area of the seat nice and smooth. Don't do too much (it can distort the shape of the seat with too much polishing). This generally works for me. Valve compound is too abrasive.
 
  #5  
Old 10-06-06, 03:08 AM
puey61's Avatar
Member
Join Date: Apr 2004
Location: Upstate New York
Posts: 3,224
Good tip, another one for the upstairs file. Thanks Cheese. However, Bama, my records indicate that this carburetor has a replaceable inlet seat. It's black in color and may be unnoticeable in the cavity. Is the tip of your inlet needle steel or is it a rubber-like material? See if you can dig your fingernail into it -indicating rubber - or not. I believe it should be steel and therefore will have a replaceable seat. The Kohler kit part number is 12 757 03-S. and includes such items.
 
  #6  
Old 10-06-06, 03:28 AM
Member
Thread Starter
Join Date: Oct 2006
Posts: 6
The needle does have the rubber tip. The valve seat appears to be all brass and the kohler rep said the same thing. Looks like I'm going to be out $100 + for a new carb.
 
  #7  
Old 10-06-06, 02:41 PM
puey61's Avatar
Member
Join Date: Apr 2004
Location: Upstate New York
Posts: 3,224
Try Cheese's Q-tip trick first though.
 
  #8  
Old 10-07-06, 03:27 AM
Member
Thread Starter
Join Date: Oct 2006
Posts: 6
Thanks for the help, I'll give it a try.
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes