i have 10520 cant get carb right sounds like a popcorn machine. a little more finiky than my 10515. when they say a whole turn out is that on complete revolution with the screw driver. its the same walbro carb i have on my 10515
#2
sgkent
might not be the carb. Could be a valve. Could be a vacuum leak. Maybe even a hole in a muffer if it is an exhaust sound. Or it could be the blade hitting something. One turn is one full 360 degree revolution of the screwdriver or tool.
