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carb 1 then 2

  • Thread starter Thread starter MR.G
  • Start date Start date
M

MR.G

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hey folks, I have a 78 gs750C. Carb one has started to overflow while running then slowly carb 2 starts to over flow. Have taken the carbs off but not yet cleaned them. Could this be the gas tank petcock as well. Thanks
 
Usually, when you have a leak like that, it's because you have TWO failures.

1. The petcock is not stopping fuel flow.

2. The floats in the carb are not holding back the fuel.

If only one of those fails, you will never know. It's not until BOTH of them fail that you notice.

.
 
If it's overflowing only while it's running it's not the petcock's fault. It's supposed to be open when it's running.
 
tkent02 said:
If it's overflowing only while it's running it's not the petcock's fault. It's supposed to be open when it's running.
Click to expand...

Beat me to it. I was thinking the same thing. If it overflows with the engine NOT running, the problem is definitely the petcock and the float valves.
With engine running, it is float valves or float height.
 
debri

debri

What everyone else said so far and -

If debri interferes with the float valve it will never seat and fuel will keep flowing (if it's running).
 
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