I know a lot of people say that you can not mount a standard Factory transducer through hull in a tin boat. I tried my factory transducer from the in-dash Lowrance hook 4X that I have on my boat, the transducer was a skimmer type for the transom mount. Mounted it in using vaseline as a temporary adhesive. Took it out yesterday and the picture is a reading at 35 miles per hour. Readings were better at lower speed, and very good at idle speed. It did show bottom at around 45, not as well, and then kind of disappeared after that. I am happy with the strong enough reading at 35 miles per hour, since when I'm in unfamiliar water, I usually don't go over that speed anyways, and only use the hook 4 for knowing depth while running. I use the console mount Helix 9 for everything else. So I will now clean up the mess that the Vaseline made, and permanently mounted with a two-part epoxy.