Hey All, i have a Mercury V6 175hp sportjet, lost power dropped cylinders, then ran 2--3 cyl, then stopped , now won;t start, i have reasonable spark on left bank top two cylinders ( bottom Cyl i can't see spark tester), no spark on right bank,,, i've measured Stator, Trigger, Coils all OK ( with in manufacters spec,, how do i test switch box and the TKS ECM... Thanks Mark
