I have a 1993 Mercury 115 HP, 4 Cyl, 2 stroke. Went to the lake the other day, unloaded it, started it up, boated to fishing spot, fished for an hour, went to move to another spot. Boat wouldn't start! Motor turns over easily, but won't start. Check for fuel, got it. Check for Spark, don't got it. Check the kill switch, it's good and in place. Where do I look next??????