Have a 96 265 Bayliner 5.7 2 barrel thunderbolt 5 ,So I just got mercarb rebuilt and installed and all adjustments done to it . Have a problem when in neutral and i rev it up to 2000 rpm or more the rpms dont come back down to normal idle 750 rpm , they stay at about 1500rpms and very very slowly will come down to around the normal idle rpm but takes a while if i push the throttle linkage bye hand it will go back to normal idle but defenatley not the way it use to be before rebuilt carb installed , maybe choke ,maybe linkage , ideal screw adjustment Any one out thier have any pointers they can give Me ?? Thanks MIKE