A mate asked me to look at one of his customers Stihl blowers as it wasn't working.
My usual reply : "Doing nothing would give me grerater pleasure"
Open carb surgery on it revealed that it had crud in the internals, the throttle arm didn't actually contact the idle adjuster so it couldn't be adjusted for idle until I'd bent it into shape, adjusted the metering lever to the correct spec...... and whoever got to it before me had connected up the two fuel pipes the wrong way 'round. That's a good number of faults for something that is only 1½" square