What is the recommended action when indications of an abnormal start are present?

When indications of an abnormal start are present, the recommended action is to begin the abort start procedure. This is crucial for ensuring safety and preventing potential damage to the aircraft's engine or systems. An abnormal start can signify issues such as insufficient fuel flow, ignition problems, or mechanical failures. By following the abort start procedure, the pilot can effectively terminate the starting sequence to avoid further complications and assess the situation.

Continuing the start procedure may exacerbate a potentially dangerous scenario, while checking fuel levels or increasing engine throttle could lead to further complications if the underlying problem is not addressed. Therefore, initiating the abort start procedure is the safest and most prudent course of action when faced with abnormal start indications.