![]() ![]() I just purchased a vintage Sears Craftsman timing light on E-Bay which works awesome. They said it will give false reading and you "would" damage the dial back timing light. I called Innova and their tech services people told me that their light will not function properly on any multi spark ignition systems. The question I REALLY have, though, is how the heck can the tachometer display on this timing light be accurate with all the multi-spark features of the MSD ? I find the two facts - tach very accurate but timing advance/retard inoperable/ineffective - to be baffling.I posted a thread here on the forum a couple months ago regarding this very issue. I will attest to that with my experience here despite several of you stating above that yours works fine. I’ve got an MSD 6A ignition and all the threads I see (and other research I did, too) say that this ignition box is not compatible with dial back timing lights. However, advancing/retarding the timing with the up/down arrows on the timing light does nothing with regard to moving the timing mark. I just got my awesome new Innova 3568 dial back timing light. The question I REALLY have, though, is how the heck can the tachometer display on this timing light be accurate with all the multi-spark features of the MSD ? I find the two facts - tach very accurate but timing advance/retard inoperable/ineffective - to be baffling. I didn't see any difference from my dial back timing light although I had to "read" through all the flutter.I just got my awesome new Innova 3568 dial back timing light. I put a timing tape on my harmonic balancer and used a regular timing light to set the total timing at 35*. ![]()
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