I just purchased a 97 yamaha 90 inshore. I currently have a 95 yamaha c115 on my action craft 1620 fly fisher. I was told by the dealer the the wiring harness currently on my boat can be used for the 90. What is the difference between the the inshore series and standard 90? can my cables and harness be used? and will the existing holes on the transom be used? I'm hoping it will be a fast easy swap.