Mikita ea6100 won’t stay idle

[MarvelousChester]

Newbie saw user, chainsaw I bought new I believe in 2021, it’s ran fine last time I used it in summer. Now I start it, it revs really fast for about 20 seconds then dies. Air filter is clean, then I have to choke it again then put in start and it goes back to rev high for 20 sec and die. The fuel is was treated with star tron over the summer, any suggestions? Maybe drain all fuel and put some already mixed on can?

Thanks