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carb leaking gas...Help Please

  • Thread starter Thread starter Anonymous
  • Start date Start date
A

Anonymous

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alright, my buddy has a 80 gs750 and the left side inside plug and carb is acting up, The plug is fouling up and has a wet gas smelling. Then the carb on the left side inside started leaking gas. Is this a sign that the carbs need cleaning or the petcock is shot? I hope its one of these and not something really serious.
 
Detach and block the vacuum line from carb #2 to the petcock. Swap a spark plug from a different cylinder into #2. Switch the petcock to 'PRI' when running the engine.

If that 'solves' the problem, your petcock is leaky. Otherwise, it's the carb. Don't discount the possibility that both components have problems at the same time.
 
Go ahead and do the petcock check as Robert said. That's quick and easy to do. Another cause of excess fuel fouling the plug and fuel spilling out of the (overflow tube in your case?) is a leaking float needle valve or sticking float.
Some members have had luck just by tapping the float bowl to stop a sticking float. If that fails, take off the bowl and clean the valve and its seat of any dirt that's stopping the valve from seating. If the valve has a groove worn around its tip or a weak spring, it may have to be replaced. You may have to adjust the float height next if the problem is still there.
Adjusting the float correctly requires removing the carbs.
 
Fuel can get pass the o-rings on the float valve seats. Need to check them too.
 
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