I have a 1950's model 33 horse Evinrude that I can not start because I can not get fuel to the engine. The gas tank and engine connection has two hose ports, one for air and one for fuel. I bought new gas lines and installed the primer bulb (the primer bulb has a ball inside it) to the line that feeds the fuel bowl on the engine. When I pump the primer bulb the gas comes out intermitting at best and does not reach the fuel bowl of the engine. Can someone tell me what the problem is???