We did it and it died in short order due to the console being so low and us launching off the beach and getting plenty of water in the boat and thus drowning the radio.
A good idea that didn't work out so we went back to handhelds.
Similar problem with pretty much all the electrics on the SR4 when launching through surf in my experience.
One option to consider if you are short of space is some of the slightly more expensive radios like the Standard Horizon GX1500E (alternatives are available from most of the main makes) which come with an optional "remote" station / 2nd handset. You can then hide the main radio anywhere you want totally out the way and well protected from the elements and you just have a small (1" ish) socket to find a space for on the console. The handset is also removable which is useful for security and most "passers by" wouldn't realise there was a VHF at all.