I have a 1982? 35hp Johnson. Model#J35RLCND Ser.#E5651206. Motor ran last year, and sat all winter and summer. Trying to get it running again for hunting season, but it has no spark. People have told me that it is unlikely that both coils would go at the same time. I am wondering if it could be the power pack. Is there any way to check the power pack?