On the subject of throttle position, remember that on a governed engine (like we're dealing with here), full throttle on the throttle lever doesn't necessarily mean wide open throttle on the engine. Full throttle on the lever sets the spring tension on the governor to operate the engine at 3600 rpm, the factory-recommended setting. The governor will open the throttle automatically and in proportion to the speed droop below the set point (3600 rpm) as a function of the load imposed. As the load is reduced, throttle automatically closes due to the governor's efforts to keep speed at 3600 rpm. Running the Kohler at full governed speed is actually beneficial for good engine life as cooling airflow is maximized, lubrication is improved (which carries away more heat from the piston interior) and bearing loads (from combustion) are reduced.
Thus, don't hesitate to run her at full governed speed for most every job.
Thus, don't hesitate to run her at full governed speed for most every job.