I got a 1998 mariner that's not getting spark on the bottom cylinder when I first start it, or after it sits a while. It's getting plenty of gas. It's not the coil. After I run it for about 15 min. on 1 cylinder it tries to go and eventually both cylinders fire and it runs great , it don't miss a beat and usually runs good the rest of the day. I'm thinking it's got to be the switchbox or stator. I don't have the equip to test it. Any help would be appreciated.