hello i have a 2hp mariner/yamaha outboard, model is 2B
6A1 078449. i have changed the head gasket and gaskets that seperate the exhuast/water as it was letting in water into the cylinder. now thats sorted out i am wondering what the idle screw at the side of carb is ajusted to ? and also what the small pipe behind the carb does it goes from top of behind carb to underneath behind carb ? and what year it is ? can the small pipe if bloced stop the engine starting you can just see pipe in pics http://http://s260.photobucket.com/albums/ii13/mark1rev/?
action=view¤t=DSC09326.jpg
http://s260.photobucket.com/albums/ii13/mark1rev/?action=view¤t=DSC09324.jpg
6A1 078449. i have changed the head gasket and gaskets that seperate the exhuast/water as it was letting in water into the cylinder. now thats sorted out i am wondering what the idle screw at the side of carb is ajusted to ? and also what the small pipe behind the carb does it goes from top of behind carb to underneath behind carb ? and what year it is ? can the small pipe if bloced stop the engine starting you can just see pipe in pics http://http://s260.photobucket.com/albums/ii13/mark1rev/?
action=view¤t=DSC09326.jpg
http://s260.photobucket.com/albums/ii13/mark1rev/?action=view¤t=DSC09324.jpg