Mounting transducer on aluminum boat
I just bought a new depth finder and will be putting it on a 16 foot aluminum boat. It is a 2D and down imagining finder. No side imagining . Before I install I want to see if anyone has any pointers or opinions on mounting a transducer on an aluminum boat. I've been doing a little research on the topic and have seen several options. I would like to drill holes and mount directly on the transom. Is this the best option? Are there any concerns when mounting that way? What type of silicone or any other product is the best for sealing the holes when I insert the screws?
Thank you for any advice!