How long to cook a 13lb pork picnic with bone in a convection oven?

To cook a 13-pound pork picnic with the bone in a convection oven, preheat the oven to 325°F (163°C). Generally, it will take about 20-25 minutes per pound, so expect a cooking time of approximately 4 to 5 hours. Use a meat thermometer to ensure the internal temperature reaches at least 190°F (88°C) for optimal tenderness. Let it rest for at least 15-20 minutes before carving.