I have what I was told is a military 97 Johnson 35hp but the motor has no model number or serial number.It is a 2 cylinder tiller with rope start.I replaced the cam actuator by using the part number.Now I need a powerpack but the part number is worn off.My mechanic can't find one to match it & wants to try to splice in a used one he has.The wire colors don't match. There has got to be a better way to do this!