I just bought a Shell lake with an 18 horse evinrude fastwin. The first time i took it for a spin it wouldnt run unless you would pump the bulb constantly. I went and bought a new bulb assembly with the hoses and connectors and took it out that day it ran fine i let it sit over night the next day i tried to take it out and it was doing the same thing again. So i know its the bulb, i have been runing it while pumping the bulb the engine wants to run. I just pulled the hose off of the tank and engine and noticed the bulb was extreamly hard i couldnt squeeze it at all. I stuck a screw in both ends and pumped out about a pint of gas and noticed when it was all out i pulled the screws out and the bulb was easyier than ever to squeeze do i have to do this after every use to make sure the engine will run fine every time or can i fix it? Please i really would like any suggestions.