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Spark plug harness question

Charles in SC

Well Known Member
On an IO360 does the left mag fire the top or bottom plugs on the right cyls. Or does it matter? I have found info showing both ways.
Thanks in advance!
 
Split

On mine, the right pmag fires the top right and the bottom left. Left pmag is obviously opposite. If you have one electronic, I believe the recommendation is for the electronic to fire the bottoms because it produces a hotter spark.
 
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