A gas flow-timer assembly for use with a barbecue gas grill having at least one burner valve with a first burner controller to heat at least one corresponding grill burner. The first burner controller is disposable onto a first burner valve. The gas flow-timer assembly also includes a gas flow-timer manifold disposable onto a gas input line from the gas source. The gas flow-timer manifold is also disposable onto a gas output line connected to the first burner valve. The gas flow-timer manifold further includes a gas flow-timer to regulate the delivery of gas from the gas flow-timer manifold, through the gas output line, to the first burner valve for a selected duration of time.