Replacing Governor Spring

Thanks for the replies. Neil, yes there certainly are a lot of variables and the age factor is a complication. I do have a quite new carb on it, and have recently decided to be more aggressive with exercise... more frequently and more load during. That in itself probably is the most important thing I have ever done for it.

JD, thanks also for telling what you have experienced. I'll make the spring replacement, now that I have it, and will take it from there. It was a very inexpensive item and can't hurt, for sure.