Re: Carburetor issue Home › Forum › Ask A Member › Carburetor issue › Re: Carburetor issue frankrUS Member - 1 Year (includes $3 online payment fee)Replies: 6715Topics: 51 July 7, 2018 at 7:36 pm #79186 Not a merc guy, but I’m thinking 3/4 turn on idle (air) needle. But not likely that is the problem anyway.