I never put stabilizer in my gas to over winter and have not had any problems. Give it a try. It will either start or it won't. If it doesn't, try fresh gas.
Chevron puts Techron in thier gas which makes a huge difference. I have a friend who bites the bullet and run it all the time. I don't myself because it is normally abot 25-30 a gal higher in price and 2 MPG, that addd up to a lot of $$$.
I add Techron to my vehicles to help keep the injectors and O2 sensors clean and keep the check engine light off.
So, Would you fellas recommend using a bottle of Techron Concentrate in an outboard?