My Theory on how Ethanol Gas damages small engine carburetors

In this video I explain my theory on why ethanol gasoline turns to goo in the carburetor when left sitting for a long time.
This applies to any small engine with a gravity fed carburetor.

See full length video here, where I also install a fuel shut off valve to prevent the ethanol replacement from happening.
https://rumble.com/v3kdeiy-lawnmower-fuel-shut-off-valve-install-protection-from-ethanol-gas-damage.html