I have a 1997 Evinrude Intruder and my question is. I pump up the primer bulb until it is firm and the boat starts and runs great. But after I have been stopped for awhile. I start the motor and it dies. I go back and check the primer bulb and it is soft again. Anyone know what might be going on. When it was cold out side it never did that. But now that it is hotter than the gates of H@## it started doing this? Any help would be great appreciated...