Troy Bilt push mower running very rough

[aw12620]

I have a Troy Bilt TB110 push mower that is running rough (about 1 year old). I picked it up from a friend because he couldn't get it started. I was able to clean up the carburetor and get it running, but it still surges a bit. When it surges, it shoots out a decent amount of black smoke. I ran some Sea Foam in it and it did not seem to make a difference. The air filter isn't new, but in very good shape. I am thinking that it is running rich. I pulled the spark plug and cleaned it up with a wire brush. The plug had a good amount of black carbon build up that was easy to remove with a paper towel. This model has the all plastic carburetor that does not have a float/needle in it. Any ideas or suggestions? I am stuck. Thanks for the help!!

 

[ElectricBlake]

Make sure the float needle and seat in the carburetor is good. If the needle does not seat it will run rich. A good way to test to take the fuel line off the carburetor and plug it. If it runs good without a fuel line until the bowl is empty the needle and seat are to blame.

 

[aw12620]

The carburetor on this mower does not have a float and needle. Its the newer all plastic carburetor from Briggs and Stratton.

 

[mechanic mark]

http://www.troybilt.com/wcsstore/Tr...lkBehind/TB110_TB120_TB130_769-09192_2014.pdf

http://www4.briggsandstratton.com/m...on_Troubleshooting_Detail_Reference_Guide.pdf

see page 18 engine runs erratic, post model xxxxxx, type xxxx, trim xx & code from B&S engine.

 

[aw12620]

Troy-Bilt TB110 21"
Model #: 11A-A230711

Briggs & Stratton 550EX 140cc

 

[BlazNT]

The carburetor on this mower does not have a float and needle. Its the newer all plastic carburetor from Briggs and Stratton.

How to clean the carb, float and needle.
https://www.youtube.com/watch?v=Kmm-yDEW948

 

[hdsport]

Very typical.....replace the diaphragm. Looks like ethanol gas has another victim.
I have done many of this quick repair and the results are amazing!!!
Keep us posted on your efforts.












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[aw12620]

Update:

I took the carburetor off and cleaned it again. Let it soak in carburetor cleaner for a bit then blew out each each with the air compressor. I also changed the oil, air filter, spark plug and put some fresh gas in it. Every thing looks brand new in the carburetor. The float and needle look brand new. This model doesn't have a diaphragm. Still not running worth a crap. Still spitting out black smoke. Any other ideas? I am stuck. Thanks for the help.

 

[BlazNT]

picture of carb please.

 

[bertsmobile1]

Same story for you.
Buy an inline neon spark tester , fit it and watch the flashing.
If it flashes and the engine is not firing them you have a fuel problem
if it doesn't flash when the engine misses you have an electrical problem.