Step 1

Preheat an outdoor grill to 400 degrees F (200 degrees C). Place turkey breast-side up in a roasting pan.

Step 2

Put water in a large pot and bring to a boil. Add butter, seasoned salt, bouillon cubes, and black pepper to the pot; stir basting liquid well to combine.

Step 3

Draw up 30 milliliters basting liquid in a marinade injector; inject throughout bird. Pour remaining liquid into bottom of roasting pan, cover with aluminum foil.

Step 4

Bake turkey on the preheated grill, basting every 30 minutes, until no longer pink at the bone and the juices run clear, about 3 1/2 hours. An instant-read thermometer inserted into the thickest part of the thigh should read 165 degrees F (74 degrees C). Remove turkey from grill, keep covered, and allow to rest in a warm area 10 to 15 minutes before slicing.