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March 20, 2019 at 9:38 pm
#171643
When I first got my Neptune OB64 I tested the coil on Merc O Tonic got no spark. They I checked with Ohm meter and results confused me. Here is how I got a spark using the tester. Connected both plug wires to plugs then put the plugs on small piece of tin and clipped jumper wire to tin one end and the other to tester ground lead. Connected red power lead to coil primary and primary ground to tester ground. They I had spark both plugs. You know some of the B & S coils have electronics and don”t need points.