45 minutes
At a cooking temperature between 300 and 350 degrees F it takes a turkey around 20 minutes per pound to cook. A 15 pound turkey should take around 5 hours to cook. When the internal temperature of the turkey reaches 160 to 165 degree F it is time to get it off the heat. This will determine the amount of fuel needed and for how long the grill will need to burn. Just as a general guideline and calculated on the safe side, a 12 pound/5.5 kg turkey will take 4 hours and a 15 pound/7 kg turkey will take 5 hours. I do not recommend cooking a turkey larger than 18 pounds/8 kg on a rotisserie. A 4-5 lb. turkey breast should take about an 1 hour and 15-30 minutes to cook, but time will vary depending on the size of the bird and the grill temperature fluctuations. About an hour into the cooking time, start checking the temperature of the bird in 15-minute increments. Step 3: Place your turkey breast on the grill, skin side up with a heat proof drip pan filled with about a 1/2 inch of water strategically set beneath it to catch all of the drippings. Step 4: Check your bird, drip pan and grill about 30 minutes into the cooking time Cook a Turkey in a Gas Grill. Step 1- Prepare the Turkey If frozen, thaw the turkey safely. That means thawing in the refrigerator (figure one day in the fridge for every 4 pounds of turkey), or thawing the turkey in a sinkful of cold water. Flip it back to breast up for the last half hour of cooking. Step 6- Grilling the Turkey I prefer to keep the grill temp at between 250 and 300 degrees. 250 is the very minimum I'd cook a turkey at. If you'd like to cook at over 300 degrees, that's fine. Step 5- Put The Turkey in the Grill Place the turkey on the cool side of the grill, and rotate it 180 degrees every 45 minutes to ensure even cooking. Start with the breast facing up for the first 1 to 2 hours, then turn the breast down, and continue cooking. Flip it back to breast up for the last half hour of cooking. Step 6- Grilling the Turkey I prefer to keep the grill temp at between 250 and 300 degrees. 250 is the very minimum I'd cook a turkey at. If you'd like to cook at over 300 degrees, that's fine. Arrange turkey breast side up, in center of cooking grate. Place lid on grill. Cook 11 to 13 minutes per pound or until an instant read thermometer inserted into the thickest part of the thigh not touching bone registers 180 degrees and the juices run clear. Transfer turkey to a platter. Close the lid and preheat 10 to 15 minutes to bring the grill to 500 to 550 degrees. Turn burners down to medium heat. Place turkey breast side up in a roast holder inside a foil drip pan. Position pan in the center of the cooking grate and place the lid on the grill Cut it in half and put it in the turkey pan on the grill. I added a 15oz can of chicken broth. 2 burners on the opposite side struggled to stay at 350, but it cooked well at 300. At 2 hours, I took it out of the pan and put it on the heated side for about 10 minutes per side, then back in the pan. She agreed and we fired up the grill. That is, I turned on the gas. In fact, I don’t think I would attempt this without a gas grill because a 12-pound bird takes 2.4 hours to cook. I don’t know how you would keep the coals hot for all that time. 1 Close lid and cook with minimal peeking. 2  Depending on burner arrangement, it may be necessary to turn turkey over, halfway through grilling for even cooking. 3  Using meat thermometer, cook turkey to internal temperature of 180° F in thigh and 170° F in breast. 4  10 to 16 lb. turkeys will take 2 to 3 hours to grill. 1 Cover grill, leaving vents open. 2  Add 6 to 8 briquettes to each side every 45 to 60 minutes. 3  Using meat thermometer, cook turkey to internal temperature of 180° F in thigh and 170° F in breast. 4  10 to 16 lb. turkeys will take 2 to 3 hours to grill. 5  When done, remove and let stand for 15 minutes before carving
http://bbq.about.com/od/turkey/ss/Rotisserie-Turkey.htm http://www.plainvillefarms.com/blog/flavorful-ideas/how-to-grill-a-turkey-breast/ http://www.smoker-cooking.com/cook-turkey-gas-grill.html http://www.smoker-cooking.com/cook-turkey-gas-grill.html http://www.foodnetwork.com/recipes/turkey-on-the-grill-recipe.html#! http://www.reluctantgourmet.com/how-to-grill-your-turkey-on-a-barbecue/ http://www.butterball.com/how-tos/grill-a-turkey
how long does it take to cook a turkey on gas grill