Thread: off idle stumble

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With the motor and switch off, hang your face over the top of the carb and give the linkage a good pull. Look to see if you're getting a pump shot. The symptom you're describing sounds like a lack of accelerator pump shot.

I had this same problem, (assuming the accel pump is shoddy..) I went and bought a new edelbrock 600cfm carb. after I started to pull the old one apart and found that corrosion had been eating up some critical components and walls of the carburator.

Try a new accelerator pump in it if you can find one, its the cheapest carb fix I know of besides buying a new kit then buying a new carb. =\
You'll more than likely have to re-set your carb's mixture when you do this, but you know this. <3

And check your plugs for any gunk on them as well. Poor spark has done this to me multiple times.