Mix in the marinade and let the turkey legs stand in it for at least 6 hours, preferably overnight.
Heat the charcoal kettle grill on one side, put the lid on and bring the temperature to 250 degrees. Place the turkey legs (in the indirect area), turn the heat down to 200 degrees and grill the legs indirectly for 90-100 minutes, turning several times and brushing with the marinade. Then grill again for 5-10 minutes on direct heat, turning regularly.