All I do with my mower is put in gas. No premium gas. Check the oil. It's always OK. Never put in Stabil over the winter. They start right up. If there's a problem, a little shot of starter fluid does the job. Never had major trouble with any of my dozen gas engine toys. Never drain any of the dozen tanks. Most of them were purchased in 2008 when we moved to a large lot. Oh, I tore down the carb on an Echo chainsaw to clean it up.
Start em, use em, put them away.
I just remembered. About 5 years ago, I bought a "rebuilt" TroyBilt edger with a B&S engine cheap at Lowes. Wouldn't start when I got it home. The grill on the rope starter housing was crushed and I couldn't pull the rope. Fixed it. Tore down the cheapo plastic carb and cleaned and blew it out. Started right up. The next time, two weeks later, no start. Use some starter fluid and it started. I don't think the carb and primer are well designed. Often gas starved when starting. Dies. TroyBilt blames B&S and B&S blames TroyBilt and alcohol in the gas. After two weeks? The design of the belt drive on the edger is terrible. Too twisty It broke after three uses.
The TroyBilt is not the same company as it was in the 70s-80s. Owned by a cheap mower company. Wouldn't buy one today.
.
I think the troy is nopw owned by MTD, who also own Husquavarna, Sears, etc.
The older stuff is less affected by storage problems, but tend to be more work to start the first time in the spring.
The newer stuff with the total plastic carbs absoluterly have to be run dry before storage, or you’re going to be in the market for a $125 carburetor.