I have a 6 HP evinrude model no. e6rcud with no spark. I tested the kill switch to make sure it was not shorted and all is good. I was talking to a guy that "knows boats" and he told me to replace the power pack and timer base as a set because if one is bad the other maybe real close. Is this true? How would I test either of these components. I have been an automotive tech for 16 years so don't be afraid to get to technical on me. Any help would be awesome.