What years are we talking? I know the Outbacks are very underpowered just pulling themselves around!I wouldn't even want to tow a normal size PuP with one. maybe a small one but that's it. No you don't need a big truck, but you want something comfortable and with enough power to tow with especially when you hit some hills! this is coming from someone who used to tow a 5k lb TT with a 95 Explorer with a 4.0L. so Im not one of the "big truck" guys. just real world experience!
You will not be happy towing anything other than the smallest of PuP`s with the Outback. even a newer one would still be overwhelmed.