What is critical about the final fuel control adjustments?

Final fuel control adjustments are crucial because they directly influence the engine's performance and efficiency. The adjustment process must typically involve increases in fuel flow to ensure that the engine receives adequate fuel for optimal operation. This is important to prevent issues such as fuel starvation, which can lead to engine stalling or performance loss.

Making adjustments in an increasing direction allows for fine-tuning the balance between air and fuel, ensuring that combustion processes are efficient and effective. When these adjustments are approached with this methodology, it helps to achieve the desired power output and fuel economy.

While other methods of adjustment may seem plausible in specific contexts, the increasing approach is widely accepted as a standard for achieving the most reliable and consistent performance in systems requiring precise fuel metering.