During which part of carburetor maintenance is it crucial to check the low idle speed adjusting screw?

The best time to check the low idle speed adjusting screw is after reassembly of the carburetor because this phase ensures that all components are correctly installed and functional. Once the carburetor has been reassembled, it is critical to fine-tune adjustments such as the idle speed. This adjustment impacts the performance of the engine, particularly at low RPMs when the engine is idling.

By checking and adjusting the low idle speed screw after reassembly, you can ensure the engine runs smoothly, minimizes stalling, and operates efficiently at idle. Other aspects of maintenance may involve cleaning or separate assembly steps, but adjustments should always be confirmed after everything is put back together to account for any changes or potential misalignments that may have occurred during the reassembly process.