In which position should the speed control be set when adjusting the governor?

Setting the speed control to the fast or wide-open throttle position when adjusting the governor is essential because this position allows for a comprehensive calibration of the governor's response under maximum load conditions. At wide-open throttle, the engine operates at its highest RPM, which ensures that the governor can effectively measure and control the engine speed under the most demanding conditions. This setting enables precise adjustments to be made, ensuring that the governor reacts correctly when the engine experiences variations in load.

When the governor is adjusted in this position, it provides a clear benchmark for the governor’s ability to maintain engine speed, which is critical for optimal engine performance. Adjusting at idle or lower speeds may not adequately test the governor's functionality under full power loads, leading to potential performance issues when the engine is operating at higher speeds and loads.