We have 2-2 strokes and run the fuel out if we're not using them for a few weeks or more. The only carburetor I have rebuilt was the one that I didn't run out.
The gas partially evaporated in the bowl and left a varnish type residue there and in the jets. Our 15 hp Yamaha 2 stroke we used daily for 6-10 months per year for 6 years. That carburetor has never been taken apart. We do try to get ethanol free gas.