My primer is a yellow button on top with a button on the side which I push in al lthe way then I pump the yellow button. Is it the same one your talking about? If so, what am I exactly tightening when I push all the way down? I did the fuel line thing with loosening the nuts, but still nothing. All my engine is doing now is taking the fuel, trying to turn over but struggling, then fuel line goes empty. I am thinking maybe a clog somewhere in the injector itself but am not entirely sure, since it was cold for a while here.