I will dig into the service manual and perform the test you mentioned relating RPM to timing and smooth operation of the advance.
<<slow cranking caused by too much advance on a hot start>>
My engine when hot takes a little more time with the starter than when the engine is cold. How do I measure if i have too much advance while hot engine is cranking? There would only be a few seconds with the timing light before the engine started. It would not be enough time to see with the timing light.
Are the springs available/serviceable if i determine that the centrifical advance is not smooth or accurate across the RPM range?
1982 300D Turbo