I was tearing down my Extech .21 to replace the connecting rod and noticed there were no head shims. Is that normal? My RB came with 2 from the factory. I was thinking about using my RB carb as well. Any feed back as to how it performs as well as base line needle settings? As far as Dishsoap’s issues are concerned, mine acted the some way and it turned out to be a worn out connecting rod where it connected to the crankshaft pin.

Rick