I have a 1997 Johnson 175 V6 and I have bought 2 ignition coils because it keeps on going bad. This is the upper coil. Am I having trouble with the power pack or is it just that I'm out of luck and the coils I'm buying are defective. I did buy from amazon not original from Johnson I did buy it original and should arrive in a few days. Please any suggestions before installing new coil???