You need to check the rpm at full throttle. 'As an experiment I put a governor from a 154 on my cub a few years ago. Due to the lighter weights, etc. it went from idle to full speed at a little over half throttle travel. That is ok if all you do is ride around or mow, but if you do other things that do not require full throttle, it is sometimes hard to pick the right RPM, so I put the original back when I was done. If you are not getting full RPM, check the RPM limit adjustment that is at the top front of the governor assembly. It may be adjusted down too far.
"The Constitution is not an instrument for the government
to restrain the people, it is an instrument for the people to restrain the
government lest it come to dominate our lives and interests." Patrick Henry