Its a 2021 9.9 mercury, and every time I press the start button on my outboard, it will start for about a second and immediately shut off. I have a new fuel tank with a new fuel supply as well. I just got the motor about 2 weeks ago and it looks fairly brand new, though I don't know if the previous owner had use ethanol or not. If I pull the choke all the way it'll give an aggressive start and then shut off immediately.