[blue62]

Originally Posted by jpc763

As I said, it starts up a little rough but settles in.

Is this what I need?

HFS (R) Carburetor Carb Valve Fuel Pump Pressure & Vacuum Tester Gauge Test Kit https://www.amazon.com/dp/B00KRJFSFQ/ref=cm_sw_r_cp_api_glt_fabc_B51EGBDZ2G3WPSEA6KRE

Yes that is perfect....

So a rough or lumpy or hunting idle that smooths out at higher RPM is an indication of a vacuum leak.
But once you have the vacuum gauge I will tell you how to connect it and do the test correctly and we should know if you have a vacuum leak.