#4 coil no fire all others OK,installed new coil still no fire.swapped switch boxes now no fire on #3 but do have on #4.so installed the new switch box which goes to 135 and the good old one to 246.But now old one completely bad. Is there something else that can short the switch box out?I am going to have to buy a new switch box but do not want it to go bad also. Book I have had me ohm the trigger with a reading of 1100 to 1400 OK and stator between two yellow wires of less than 1ohm wires to ground with no continuity.Merc V-200,1990,oc217777 Thanks