I have a motor i was told was a 73 evinrude 60 hp the model no is 60173c sn# j13222 I have a book for the 73-91 engines but it only shows a 89 60 hp by evinrude. It is a 3cyl 3 carb one coil with the amplifier box next to the coil. it doesn't seem to be getting any spark so I need to know if...