Hey Dirk!
I’ve been running a Humminbird 898 since summer 2010. As with every person contemplating purchasing a side scan unit – be it Lowrance or Humminbird – I was on the fence for quite a bit, but decided to bite the bullet and fork out the extra money. I’m not much of a technology guru like some fisherman; in fact I am usually the complete opposite. However, I was fully aware of the advantages that side scan sonar had over standard 2D sonar and knew it would be a worthy investment for me. I too was worried about the transducer getting damaged. And at a $200+ replacement cost it is a legitimate concern to have! I can’t speak for Lowrance but the Humminbirds have a “break-away” style transducer that allows the transducer to pivot upward should you drive over a log. I’ve had my 18’ boat hung up on logs/trees plenty times and had the transducer pushed up 90 degrees with no real problems or breaks. Of course high speed impacts will do damage. Sidescan transducers are much more “finicky” than a plain 2D sonar. Small adjustments can make a big differene. The errors and angles are exacerbated the further from the boat you are scanning. When mine gets bumped and is not sitting perfect there are subtle tell-tale signs in the readout that give me an indication to reach down and readjust.
I should mention that I have 2 tranducers mounted on my transom – my old HB style and the new HB sidescan transducer. Despite being mounted only inches apart, I have busted off the old HB transducer from the mounting bracket numerous times and the sidescan transducer is still holding on firmly. As I stated before, HB uses a kick-up style transducer that is designed to pivot upward when hit – this is because the transducer itself does not have the “teeth” that are usually present on the old style tranducers used to set the transducer angle. Instead, the sidescan transducer stays in place with simple toothed washers. I suppose over time the transducer will become loose. At that point I think I can just purchase a new mounting bracket (~$15?).
The only downside to purchasing a sidescan unit is the obvious cost.