38racing wrote:
with the hex end would using a hand impact on it work or would it tend to split the brass even sooner?
It isnt the "tight" that locks them in - it is the corrosion and gum/varnish that does - much like loctite - hand impact would probably break the carburetor in one place or another if you were using enough hammer force to make it useful at the very lest it would damage things beyond service - would be better off using a good fitting screwdriver as noted before - hollow ground and straight sided (preferably with some radius to the edges so they don't dig into the soft threads - which is why the OEM Briggs tool is a round body shank) and strip down the carburetor all the way to the body and use a bit of heat on the aluminum body around the threads - use thermal expansion to break the "glue" holding the nozzle so tight. - if THAT dont get it out without damage, nothing will.