Depth finder won't keep up with boat

[Brandon__]

I have an eagle on mine it has an option to change the reading speed, maybe an option for yours?

[09Z7SC]

Best option for a tin boat is a through hull mount on the pad, making sure it is not behind a line of rivets. Otherwise you will not get readings at speed. Transom mount transducers are usually not completely in the water when on plane, if they are, then they are at risk of getting knocked off fairly easily.