Transom Mounted Transducer Placement

[TarponTom]

Hoop,
I also have mine mounted inside and shooting through the hull. I used Marine-Tex to epoxy it to the inside hull in the bilge, just off center by 4" to 5", working out all the air as it sets. I also maintained a horizontal attitude as it set so it can shoot straight down. I can run at any speed with a great reading. I did succumb to mounting the temperature and speed indicator on the transom reluctantly. It's amazing compared to the GPS how accurate it is.