All the sudden starts surging, pic of carburetor.

H

hollydolly

Active Member
Bought new in 2010, Zero turn JD EZ Track 54 inch
All the sudden it started surging, dies at idle. The only time it stops surging is at full throttle with blades engaged.
Tried to add pic but says file too large for server ???
 
The carburetor has two circuits. Sounds like the low/idle circuit picked up some debris. This means your fuel system and carburetor probably needs cleaned.

If you can clean it yourself, great! But if you're not ready to take it to the shop just yet, replace the fuel filter....If it runs fine at full throttle and under load, it is ok to run it!

You can have the carburetor/fuel system cleaned or run it and hope the dirt passes through. You're not going to hurt anything by running it since it runs fine under load and at full throttle.
 
Will1988 said:
The carburetor has two circuits. Sounds like the low/idle circuit picked up some debris. This means your fuel system and carburetor probably needs cleaned.

If you can clean it yourself, great! But if you're not ready to take it to the shop just yet, replace the fuel filter....If it runs fine at full throttle and under load, it is ok to run it!

You can have the carburetor/fuel system cleaned or run it and hope the dirt passes through. You're not going to hurt anything by running it since it runs fine under load and at full throttle.
Click to expand...
I replaced air, fuel filters, plugs, 2 bottles of seafoam. Same problem. How do I post a pic
 
hollydolly said:
it says, the uploaded file is too large for the server. it is just a picture of the carburetor
Click to expand...
Sometimes a high resolution picture is too large for the server. If on mobile, taking a screenshot can help reduce file size, or if on a computer, use the Snip tool to copy and paste the pic into the chat. Those are all the tricks I use. I work at a Deere dealership, so all I need is the model (serial number would be better) of your mower and I can find info on the carburetor, although I'm not sure we need that at this point since it just sounds like your system needs cleaned. If your mower has a Briggs engine, your carb may have plastic internal parts that have warped from the fuel. If cleaning doesnt help it, you'll have to replace the carb, possibly. That is all the advice I can give you for now until you get the carb checked out or cleaned. Anything else is just speculation. Good luck!
 
I've had better luck with Berrymans B12 chemtool as a fuel additive for cleaning. I've used in my own Cub a time or two when i'm too busy to work on it, and it clears it up within a few hours running.
 
Will1988 said:
Sometimes a high resolution picture is too large for the server. If on mobile, taking a screenshot can help reduce file size, or if on a computer, use the Snip tool to copy and paste the pic into the chat. Those are all the tricks I use. I work at a Deere dealership, so all I need is the model (serial number would be better) of your mower and I can find info on the carburetor, although I'm not sure we need that at this point since it just sounds like your system needs cleaned. If your mower has a Briggs engine, your carb may have plastic internal parts that have warped from the fuel. If cleaning doesnt help it, you'll have to replace the carb, possibly. That is all the advice I can give you for now until you get the carb checked out or cleaned. Anything else is just speculation. Good luck!
Click to expand...
1673368346500.jpeg
 
Being a twin barrel carburetor is very possible the main jets are loose as their retaining o-rings will shrink and harden with age. When this happens they leak excess fuel themselves leading to a surging engine.
These tiny o-rings are available from Kawasaki dealers like JD or small shops like mine when your are a local customer. I do mean tiny. You can even loose the jets if not careful upon carburetor disassembly.
 
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