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
Well, the one thing I have learned about those external coils is that a lousy looking exterior does not necessarily mean they are NFG. Needless to say, without seeing what the mice did to your coils it is hard to say if they are worth keeping….But, I would surely keep them for possible back up, you have already ordered new ones…
I’m just wondering about your explanation "..I have juice to the coils, but not the plug…." diagnosis….How did you test this? If your diagnosis is in fact correct, that would probably indicate that both of your coils are inoperative.
There are some resistance tests for these coils, but you would also need to test on the stevens/Mercotronic tester to confirm having good coils with no external leakage. In other words, just because the resistance tests come out within range does not mean the coils are good. But, if the resistance tests are way out of range, that does mean the coils are NFG.
Did you try unplugging the two stop leads and testing for spark?