Not to beat a dead horse here, but, I am assuming the Thru the hull transducer, no, holes will work on the GW 272. Please let me know if you have one and if it works ok. Looking at a Garmin 720 with a shoot thru transducer, 600W. Steve
I have a shoot through transducer with a Garmin 5" depth/gps set up. It works very well. My transducer is mounted on the bottom just forward of the batteries. Marty
Can't help you with the 740S, but you won't know if you didn't really need the bigger transducer. You would if you needed it but didn't get it ... :wink: