ARD is a fixed timing magneto and ARD made both dual and single fire mags, most are single fire mags, and your's is a single fire mag, there is a small rotor on the inside of the cap that sends the spark to each plug separately, so it does matter which wire goes to which plug.The Mag also throws me off. the internals look just like my Hunt, but the cover has staggered wire ports. I am just assuming that it is still timed correctly. Does it matter which port goes to which plug? Is it a dual fire mag...sheeet, are all mags dual fire? IS that is dumb question? Am I running full advance on this unit? Is there any choice? Adjustment? I don't see how I could adjust it like the Hunt...