Is the sausage pre-cooked or not. If it is pre-cooked you will just need to cook it enough to heated thru. Otherwise, on a BBQ pit, we will cook sausage for approximately 20-30 minutes off of direct fire.
It depends on the sausage if its pre cooked or not. And then, how fast you want to cook it. I usually like to cook it tile its just a touch burnt. 10 mins on high