To adjust the governors on engines equipped with a governed idle setting, what should be set before the governed idle speed?

When adjusting the governors on engines with a governed idle setting, the top no-load speed should be set before the governed idle speed. This is important because the top no-load speed establishes the maximum operational speed of the engine under conditions where there is no load applied. Setting this parameter ensures that the governor can effectively regulate engine speed under varying load conditions.

By first establishing the top no-load speed, the governor can have a benchmark against which it can manage the idle speed. If the governed idle speed is set without first ensuring that the top no-load speed is properly configured, it could lead to issues with engine performance and responsiveness, as the governor may not be able to control the engine speed effectively throughout its operating range.

Understanding engine speed settings and their interrelationships is crucial for ensuring optimal engine performance and longevity.