Craftsman Riding Mower - Will crank but not fire

Hi, I'm pretty careful with power equipment, when I put away equipment for the winter (mower, weed wackers, my wife's scooter, etc.) I always add gas stabilizer and run the engine for at least five minutes. Never have a problem in spring except for a few extra pulls. I've just bought a gas generator - in my area it seems as we're without power at least 5 days out of the year, often more. Now of course since I've purchased the generator, I probably won't have any more outages, but just in case.... So my question revolves around gas storage for this unit. I'll be building a platform and small covered shed for the generator and ideally, I'd love to have this thing filled with gas and ready to go when I need it (so I don't have to fill it during a big storm). The unit holds 5 gallons - any thoughts on whether I should fill it now & add a stabilizer or keep it empty and just fill it when the situation arises? In addition, I'm getting a 5 gallon Carb tank - do these thing keep gas stabilized better than the old cans/ And I just found some old stabilizer in my shed - probably at least 10 years old. Does that stuff stay stable or should I toss it? Thanks! Bob

I have a Stihl chain saw that runs good for about 5 minutes and then shuts off. If I let it sit for about 10 minutes it will start up again but will run for a few minutes and do the same. It looks like I have some kind of temperature problem. I've tried cleaning the carburator, fuel filter and air filter but it still does the same thing. Spark plug is new along with new gas and oil. Is it possible that I have a bad ignition coil or capacitor that fails with heat? Thanks for your help