1996 Johnson Fast strike 150. Every single time i put my boat in the water i have issues with it starting (idles very rough in the beginning and will stall out if i dont rev it) When i prime the motor i hear a slight sucking sound so im thinking maybe im sucking in air someplace? i replaced the primer ball and hose and siliconed the connection on top of the tank and still hear the sucking noise. Now when i do prime it the ball getts hard and i can feel the gas in the ball as im squeezing it. Also if i dont run the motor for maybe two hours and go to start it again it loses prime and the ball is soft again.... maybe crack in the fuel pump or the hose inside the tank? would rather not replace anymore stuff that doesnt need it. what do you think should be my next step?