Direct mechanical push-pull carburetor heat control linkages should normally be adjusted so that the stop located on the diverter valve will be contacted?

Adjusting direct mechanical push-pull carburetor heat control linkages so that the stop located on the diverter valve is contacted before the stop at the control lever is reached in both the HOT and COLD positions ensures that the control operates effectively within its intended range. This arrangement allows for full travel of the diverter valve, providing sufficient movement to direct the airflow properly to either the heated or unheated air source as desired.

When the adjustment is made in this manner, it helps to avoid any binding or malfunction in the system, which can occur if the control lever reaches its limit before fully actuating the diverter valve. If the valve does not reach its stops, it can lead to insufficient heating, which may not properly prevent icing in the carburetor or provide the necessary engine performance adjustments as temperature changes.

This proactive adjustment mechanism promotes safety and efficacy in operation, ensuring that pilots have reliable control over the carburetor heat system as they transition between different environmental conditions. The other options suggest adjustments that could compromise the functionality of the carburetor heat control, leading to possible operational issues.