1985 Mercury Outboard V-300 V-3.4L Shop Service Manual, Page 79Get this manual
Install noat (c) into carburetor with noat pin (d)NO TE: Float Level adjustment is the only adjustment made to adjust loatadjustment Turn carburetor upside downFloat level should be 1116" from carburetor body to bottom of noat as shown If necessary, adjust oat level by bending noat hinge (a) within bend area of hinge (b) as shown,