The engine now stays running (in neutral) at 1500 RPM?
Out of curiosity, what did it run at before?
What if you disconnect the throttle cable from the carb? Could that be hanging up and keeping it high? Maybe play with the throttle linkage by hand?
I am by no means an expert on carbs, so I might even be using some wrong terms here... but, if it's running that high, I would think something's got to be going on with the throttle valve or the jets/venturi's?
Wouldn't your worse case scenario be having a carb job done... or replacing the carb?
Out of curiosity, what did it run at before?
What if you disconnect the throttle cable from the carb? Could that be hanging up and keeping it high? Maybe play with the throttle linkage by hand?
I am by no means an expert on carbs, so I might even be using some wrong terms here... but, if it's running that high, I would think something's got to be going on with the throttle valve or the jets/venturi's?
Wouldn't your worse case scenario be having a carb job done... or replacing the carb?