IMO, it could be a coin toss.
Hopefully the previous owner topped that tank off with 'non ethanol fuel' and used either Seafoam or Star-Tron Enzyme as an initial stabilizer.
Ethanol gasoline begins to separate in a few short months and tends to leave a Vaseline type of coating on the inside of carb bowls etc. At that point, an additive may help it run the tank through but it's not going to dissolve all that gum and you might have fuel related issues or you might get lucky.
I always pull things apart and physically clean things out on snowmobiles and boats because fuel issues could be life threatening in sub zero temps or out at sea of which I do spend some time.