Time for an update on My Vacuum advance.

I received my part today, and have compared the two parts.















The Diaphragm diameter, travel of actuating rod and spring rate matches between these two units.
...But the length of the L16 actuating rod is 2.5mm longer than the A12 actuating rod.

The L16 Vacuum Advance Assembly Bolts up to the A12 Distributor. Horay!

I am guessing the longer Actuating rod will result in a difference of about 5 Deg to my inital advance from where I previously had it set.

I doubt this will limit the mechanical advance from finishing it's travel, but am not 100% sure.

If it interferes, then I will see about a 2.5mm spacer between the Distributor and Vacuum advance Assembly, and elongate the two mounting holes another 2.5mm.

I am still waiting on a new throttle chamber for my Hitachi Carb, so will not be able to test the distributor for atleast another week or so.

(I compared spring rates by clamping the units together and squeezing them through their travel, both bottomed out at the same time.)