I also run the fuel out of any implement before storage. My Echo trimmer is at least 15 years old and runs perfect. That's the last 2 stroke yard tool I have. And now the moped. They both call for 50:1 so they can share the fuel.

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Tony H
W111 280SE 3.5 Coupe
Manual transmission

Past cars:
Porsche 914 2.0
'64 Jaguar XKE Roadster
'57 Oval Window VW
'71 Toyota Hilux Pickup Truck-Dad bought new
'73 Toyota Celica GT