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How Identify #1 Cylinder?

pa38112

Well Known Member
I have Bendix 500514-1 mags with the wiring harness removed. The harness can be rotated to any position. There is no label that I can see identifying which lead is #1. Is there a way to identify on the magneto which lead is for #1?
 
On my mags

On my mags, the #1 is clearly marked on the cap where the wires come out. The harder part seems to finding the next cylinder to fire since that depends on whether it is a right of left mag.

I just used the pictures in the Lycoming manual to wire things up. I’ll make sure everything is right before first engine start, once I getbthe prop on, break the engine preservation, and start rotating the engine.
 
I have never seen a Bendix mag harness that could go on more than one way. Most of the ones I have seen have the spark plug number stamped on the nut for the spark plug that it routes to.

The following image is out of a Bendix mag overhaul manual.

Screen Shot 2022-01-23 at 1.26.50 PM.png
 
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