Sounds a little odd, kinda like a brand new engine. Maybe i'm missing something. But assuming it is not new it should not need that sort of treatment. I have a near new SH.28 3 port that is still real tight but starts up nice and easy and idles just fine.
Is the idle set right on your carb? Check down the carb throat and see how big the gap is that you can see into the engine. Around 1 to 1.5 mm (dunno inches, sorry) is a good place to start.
Is your fuel old? A mate had trouble starting his Sav .25 recently until i put some new good fuel in it. Then, no problem. If your fuel a few months old get rid of it. The "bangness" evaporates out of it over time. That is a technical term by the way