I recently purchased my first bass boat, a 2011 Nitro Z7. I am looking to upgrade my electronics. I am not going to spend a ton of money. I am considering the Garmin Echomap 73 sv. My question pertains to transducers. I have been told that transom mount transducer are not fro me. Mine will be through the hull. When I look at what comes in the box, it is either a transom mount or trolling motor mount. I am assuming that I will need to purchase a through the hull transducer. There is a lot to know about a bass boat for a newbie. I welcome any help with what I may need to look at when I make my purchase. Currently the original Lowrance Mark 5x is in the console. Thank you in advance for any input.