I have an 84 Johnson 15 and I had never taken it out til yesterday. I coould only get it to gravity feed thru regular can after taking a medicine dropper and pushing fuel thru like a bulb would. But I got me an old mercury fuel tank ( clean) And had to use a mercury fitting on fuel tank and Johnson on motor. But I would pump bulb til tight and the motor would start right up, run few minutes then stall out. I tried just about everything I knew. I played with the low speed and it would idle smooth but then die minutes later. What do you think it could be? I think the fuel pump isn't pushing fuel. I too it off and squeezed the bulb but no fuel came thru. I don't know if the is normal