Besides my own household equipment, I maintained a fleet of small engines for 6 years (110 engines, IIRC). All were brought out of service in October and brought back into service in April of the following year. There were various sizes and makes.
All of the fleet was treated the same in year #1. Stabil was mixed into E-10 gasoline and the fuel tanks were topped off after a brief run to fill carb and fuel system. In April, all of the equipment started easily and ran fine with the exception of one series of small (4 HP) Kawasaki engine. All eight of those had clogged fuel main jets. In following years, all equipment was treated the same as year #1 with the exception of the Kawasaki's. Those engines had the fuel system drained but not the tanks (steel). I wrote the clogged jets off as the way the carb fuel bowl was vented. There was enough air entering the bowl and the main jets had very small orifices.
