Will it cook the chicken more thouroughly if you boil before barbecuing?

Boiling chicken before barbecuing does not ensure thorough cooking because the temperatures achieved during boiling (around 100°C) are insufficient to destroy all harmful bacteria. Thorough cooking is achieved when the internal temperature of the chicken reaches 74°C.

Grilling or barbecuing is the recommended cooking method to reach high enough temperatures to kill bacteria. Make sure the internal temperature of the chicken reaches 74°C before consuming. You can verify this using a meat thermometer.