Re: 1949 Auto-lite Dist. Vac. Advance

Posted by Mike On 2011/8/11 10:23:13

It's likely an IGP 4502D, i have 2 just like it.

We posted on this (Assembly and connection) a bit up, and i showed all the pieces of that dist. There should be no "stop screw" or anything on that arm, and the bolt that goes through the arm and pointer and spacers, etc should be through the END of the arm. There should be only one hole in that arm, but since there is more, ignore the ones not on the end.

You mentioned you fixed it and if so, great. If it's still like it is in the above mentioned picture, when you do get a working vacuum diaphragm, and it pulls the arm, the dist can't rotate properly because the geometry is all off and the arm is trying to pull itself around a corner, instead of straight.

Put the bolt through the end of the arm, put the pointer and spacers in the right order, and put the pointer in the center of the gauge scribed on the bracket that the arm connects to. You will also find that this is going to rotate the distributor advanced some vs its current arrangement, and you might have to correct your plug wires by moving them one hole over after rotating the distributor to it's correct place.