I have a new sending unit with the attached wiring harness that I am planning on installing on my 92 I/O Four winns Cobra outdrive. There is a little rubber boot/gasket that I believe is used to keep water out of the engine compartment. My question is; Does anything have to be removed other than the old sending unit to install this? I took a quick look with the outdrive trimed all the way up before I bought the part and really couldn't see where it passes through. I am planning on using the boat this weekend and don't really need the trim indicator, so I don't want to get into a big job and end up at a dead end if I can avoid it.