For no other reason than to have pictures for reference, here is what the inside of a
vacuum advance looks like.
This is the diaphragm that is a common cause for the unit's failure to hold 'vacuum.'
As these vacuum advance units are available for $30, it's not worth the time to re-build the original ones. I took these pictures last year just to see what all would be involved with replacing the diaphragm, and thought some of y'all might be curious. I couldn’t find my pictures of the dissected spring end of the unit.
Brad
