Home › Forum › Ask A Member › juice to the coils but not to plug-25hp 1975 evinrude › Re: juice to the coils but not to plug-25hp 1975 evinrude
November 1, 2017 at 1:34 am
#66864
High point resistance might give optimistic results at the feed plug but might not flow enough current when connected to the coil. Probably using a 20,000 ohm tester or so. Leave the coil connected and then test voltage to the primary.
I have used a 12 volt battery charger to halfass test coils. Ground the black clip to the coil and scratch the coil hot wire over the red clip. Use a good plug grounded to the black clip, secondary connected. A good coil has always sparked this way for me and a bad coil never does.