It doesn't.
You guys were talking about changing the "coil" so I wasn't sure you meant "coil" rather than "module". Anyway, I've always thought that if it was a sharp miss it would be more relating to ignition and it was a surge or something of that nature then it would be more fuel related. Had a Stihl miss out and turned out to be a broken reed valve but then again, some saws don't have reeds either.
He could always start it up and run it when it's dark and see if it arcs anywhere. Found a miss in my old Chevy that way.
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