Changing the spring on the governor will stop it from working properly. There is an air vane under the cowl. The vane is moved by air blowing from the fins on the outside of the flywheel. The vane on the 60102 is poor compared with the one on the 92908 and other second-generation engines, but it will work satisfactorily. I have attached two pictures showing the governor, from the repair manual. The second one, showing the remote controlled version, shows you which hole to put the governor spring in on the operating lever. Parts of the manual show the spring and the control rod both in the upper hole. I tried that on mine and the governor was a bit unstable, like yours, so I put it back the way it had been in the first place, which is the same as shown in the second illustration: spring in the lower hole. You might try both arrangements and see what works better. Be careful not to damage the spring. It is a close-coiled tension spring: when not being stretched, the coils should be touching each other. If they are not, the spring is stretched and is useless.
