[EC900]

Ethanol is a monster when left for a season. Most old hoses swell and gum up. Even using stabilizers doesn't always help, for instance just check the cap and the pour spout on a bottle of Stabil, it even leaves sticky residue at full strength.
Higher octane gas has more detergent and helps keeping carbs clean, but in lawn equipment and generator storage I dump the gas out and I run True Fuel 93 octane through for a few minutes.

If I could I wood use ethanol free full time but it’s not available in the city.