Fuel in air filter & black smoke

[thegoaltender]

I have a 26hp Briggs and Stratton 44P777 on my craftsman garden tractor.
I recently changed the carb and fuel filter. Now the engine runs rough, produces black smoke, and spits fuel into the air filter. I changed the oil and filter thinking there may have been some fuel in the oil.
I have found that I can sometimes mess with the choke (at the carb) and get the engine running smooth, but only a very short time.
Any suggestions?

 

[Black Bart]

I have a 26hp Briggs and Stratton 44P777 on my craftsman garden tractor.
I recently changed the carb and fuel filter. Now the engine runs rough, produces black smoke, and spits fuel into the air filter. I changed the oil and filter thinking there may have been some fuel in the oil.
I have found that I can sometimes mess with the choke (at the carb) and get the engine running smooth, but only a very short time.
Any suggestions?

Find out why the choke is closing by itself.
Once you get the choke to stay off it will run ok.
My guess is you put something on wrong when you installed the new carb.

 

[thegoaltender]

OK, so the float moves freely. The engine runs fine at the lower third of the throttle setting. Once I increase the throttle beyond the lower third it starts to spit fuel up into the air filter.

 

[reddragon]

what made you replace the carb in the first place?

 

[thegoaltender]

There was no fuel getting into the bowl of the old carb

 

[originalswampfox]

The problem is most likely that the choke is closing at higher rpms. There is a choke return spring that is probably not keeping the choke open. My susgustion is to test it by taking a small peice of wire/zip tie or something else and tie the choke in the open position. If this solves the problem then you have a starting point. Below is a link to the parts breakdown. Let us know if this helps

Parts and Diagrams for Briggs and Stratton 44P777-0025-G1

 

[thegoaltender]

The problem is most likely that the choke is closing at higher rpms. There is a choke return spring that is probably not keeping the choke open. My susgustion is to test it by taking a small peice of wire/zip tie or something else and tie the choke in the open position. If this solves the problem then you have a starting point. Below is a link to the parts breakdown. Let us know if this helps

Parts and Diagrams for Briggs and Stratton 44P777-0025-G1

Thanks for your help!!!!!!
I just took apart the carb again.
I am confused regarding the choke return spring. Should I be able to see it without removing the choke valve? How does the choke return spring move the choke valve when it is controlled by the external connection?
I will try and find something to hold it open, but still don't understand how it could possible close...

 

[originalswampfox]

Ok!! now I have confused myself. If there is a choke cable on the engine it should not be able to close itself you are correct. I guess that in the past when an engine floods itself enough to get fuel in the air cleaner it has always been a choke problem. Let me know where I am wrong these are my assumptions.
1. The engine cranks and runs fine at low rpm.
2. After you rev it up it starts to run rough and spits gas into the air filter.
3. It is a Briggs and Stratton twin v engine.

Let me know where I'm wrong

 

[thegoaltender]

Ok!! now I have confused myself. If there is a choke cable on the engine it should not be able to close itself you are correct. I guess that in the past when an engine floods itself enough to get fuel in the air cleaner it has always been a choke problem. Let me know where I am wrong these are my assumptions.
1. The engine cranks and runs fine at low rpm.
2. After you rev it up it starts to run rough and spits gas into the air filter.
3. It is a Briggs and Stratton twin v engine.

Let me know where I'm wrong

Those assumptions are all correct!

 

[reddragon]

is the air cleaner stuff off?...so you can see the choke plate?....if so...does the choke start to close as the rpms are maxed out?