Start by preheating the grill to high heat (500 degrees) and closing the lid.
Once the grill is preheated, you can add the sausages.
Reduce the heat to medium and close the lid. Cook for 2 minutes.
Open up the grill and check the sausages. Flip them over. If necessary, reduce the heat.
Close the lid and cook for another 2 minutes.
Check the sausages again. Flip them over and cook (lid closed) for 3 more minutes or until they are cooked through. Check their internal temperature with a meat thermometer. It should read at least 165 degrees. If not, cook the sausages for another minute.
Once the Italian sausages are done, use fresh tongs to take them off the grill and then turn off the heat.
Video
Notes
Closing the lid during the preheating process will help the grill to heat up quicker
If, at any point, the sausages start to burn, just turn down the heat
Be sure to use clean tongs to remove cooked Italian sausages from the grill