Hello all. I own a 1996 Murray Ultra 5hp 22" model #G2250030 - Tecumseh motor # HSSK50-67394S - carb model # 640084B. The carb is leaking gas out of the choke hole. Instead of using a rebuild kit, I see some pretty cheap brand new replacement carbs on the internet which I'am considering buying, instead of coming through the hassle of rebuilding the current carb. The problem is I don't see any of the new carbs coming with the restrictor screw or the inlet valve screw that has the spring outside on the bottom of the float bowl. Is it necessary to have the spring on the inlet valve, or will a carb without one work of my machine? Any help would be appreciated. Thanks in advance.