Shake flour in a large oven bag. Place ham in bag; set in a roaster pan. Combine remaining ingredients, mixing well; pour over ham. Close bag with nylon tie provided; cut 6 to 8 slits in bag. Bake at 325 degrees for 2 hours to 2 hours and 20 minutes, or until a meat thermometer inserted into thickest part of ham reads 140 degrees.