i OWN A 1994 NITRO WITH A 1979 150 MERCURY V6. AND WONDERING IF ANYONE AS A CARB DIAGRAM TO SHOW ME WERE THE IDLE MIXTURE SCREW IS FOR RICH AND LEAN SETTINGS. I AM VERY NEW TO THE BOATING WORLD BUT WANTING TO LEARN MORE, AND GETTING MY MOTOR RUNNING BETTER. SO HOPEFULLY I GAVE YOU ENOUGH INFORMATION TO HELP ME OUT. THANKS IN ADVANCE!