Skidz,
The Si can read at faster speeds than trolling type speeds but you will loose all detail in the Si images when doing this as it cannot update as fast as the conventional 2D sonar can.

The other problem you will run into (especially on an aluminum jon type boat) is mounting the transducer in a location that will allow air bubble free water to flow across the bottom and sides of the transducer. If there is air mixed in with the water it will block the 2D or Si sonar. Larger bass type boats don’t have as much problems with this due to the way they ride across the water (aluminum jon boats tend to produce more air bubbles).

Other than these two things, the unit should work the same as on a larger Bass type boat.