Carb issue hs40

[Bbqman]

Well, I bought the service carb out my choke shaft on it. Still runs like crap Pops and backfires when I try and go full throttle. Once it gets going and it's warm full throttle does not open the butterfly the whole way. So full throttle I am going about 5 mph of that. Plus it idles to high and the idle screw not touching the butterfly. I give up. It's the same part number as original carb. Governor is set correctly. I don't get it. I have tried eBay carbs and other brands. This latest is a Tecumseh service carb with the same part number as there original. I would appreciate any help. I can't figure out out. Thanks

 

[Skipp]

I’m definitely not an expert…. In fact I have terrible luck with these carbs; that’s why I choose mainly slide carbs…. But to address your issue, to me it sounds like two problems…. Air leak for the pioping and cracking and carb needs correct adjustment on the butterfly issue…..also recheck timing?