2. Attach a tachometer.
3. Start the engine again.
4. Adjust the speed set by the throttle opening mechanism, observing the following sequence:
A) Disconnect the vacuum hose from the diaphragm assembly, plug the hose.
b) Increase the engine speed to 2500 rpm for a few seconds, release the throttle and check the speed corresponding to this throttle position (1200 rpm).
V) If necessary, adjust the speed with the adjusting screw and repeat the test procedure.
G) Connect the vacuum hose.