1982 115 inline 6 mercury has 3 fuel enrichners on the side of each carb. The main one in the middle with 2 electric wires coming from it is getting fuel in the line. Fuel is not going to the other fuel enrichners. The lines are clear so u can c right through them. Why aren't the other 2 getting fuel and its very very hard 2 start. I've cleaned the carbs please help. Thanks