I am looking for an inexpensive wiring harness. I need the internal harness. I know that the CDI 414-2770 is a replacement but, it replaces a number of other harness' which are cheaper. What is the difference and can I use ant of the other ones? I was on a different site and they told me that 84-74904 was for a 20 hp motor but the CDI replacement will work on it and my 115. I'm just weighing my options before buying. Thanks