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Walbro WYC-10 Carburetor Leaks after shutoff

jl66redcpe's Avatar

Join Date: Nov 2006
Posts: 367

12-02-11, 05:08 AM   #1  
Walbro WYC-10 Carburetor Leaks after shutoff

The carb is on a homelite UT08544 blower. I installed a complete kit K10-WYC including a needle, metering lever, diaphragms etc on this carb and it still leaks gas after I shut it off. Please help with this problem. I have tried re-adjusting the metering arm up/dpwn. If I adjust too lean it wont start/run. If I adjust the arm higher it starts, runs but leaks after I shut it. I use the walbro "w" tool to set the lever. Is there a seat that goes under the needle ??? There is a rubber o ring and what appears to be a nylon seat in the kit however I did not see one in the carb so I didnt mess with those parts.

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butcho's Avatar

Join Date: Dec 2009
Posts: 170

12-02-11, 06:38 AM   #2  

There is definitly a seat there but some walbro carbs have the seat built into the casting and some don't. Walbro sells or did sell a set of tools to remove the seat.if the pros don't come on line soon, it may be worth a call to Walbro and see what they say. I've heard of a method to just clean the seat up. take a pencil and bread of the lead end short enough to put into an electric drill and use the eraser as a polishing tool to just clean the seat up. Supposed to work, though I've never tried it.

Also went onto walbro site and the carb you're working on does not have removable seat and they're saying if the seat still keeps leaking, it's time for a new carburetor

Last edited by butcho; 12-02-11 at 07:31 AM.
cheese's Avatar
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Join Date: Jul 2001
Posts: 16,564

12-02-11, 09:41 AM   #3  
Make sure the spring is in place under the lever, and if so, take the needle out, get a q-tip and pull enough fuzz off of it so that you can get it to go down to the seat. Put some car polish or rubbing compound on the q-tip and spin it while pushing it down onto the seat. This should clean off whatever debris, corrosion, etc... that may be keeping the needle from seating. See if that does it for you.

"Who is John Galt?" - Ayn Rand (Atlas Shrugged)

God bless!

puey61's Avatar

Join Date: Apr 2004
Posts: 3,224

12-02-11, 09:47 AM   #4  
Also, from the factory, the inlet needle will have a protective coating on it (silver in color) that I have found on a few cases to cause the problem you're having. Take either WD-40 or isopropyl alcohol and remove this coating from the rubber tipped needle. This along with Cheese's suggestion and then if you still have the same issue (with a properly set inlet needle lever height) then, as butcho indicated, you'll need to replace the carb altogether.

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