I have a 1982 Glastron with 260 Mercruser with pre thunderbolt igniton and after the motor gets up to temp it starts to miss, then the more it runs the worst it becomes until it dies, it will restart but the min you try to move it will die again. I have put new plugs, wires, cap, rotor, points, coil, condenser and there is a new battery. I have clean all fuel out and changed the fuel/water seperator, found no water or sediment, very frustriated please help.
