How difficult would it be to install a Yamaha F25LWTC or Suzuki DF30ATL2? I know this is a relative question. I'm relatively mechanically inclined and not afraid of the idea, but don't want to throw away $4500. This would be on a 1963 Boston Whaler 13. What would the process be from open box to on the water? Any tips not included in the manual? Anything I need to do or worry about to maintain warranty? Or is this this kind of thing that is inexpensive enough or important enough to let the pros do it?