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RV-7A Construction Log
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Date:  7-12-2017
Number of Hours:  2.00
Manual Reference:  
Brief Description:  Spark Plug Wires 1

I decided it was time to install the spark plug wires. Turns out to be tricky. First I looked at the Lycoming diagram that shows two wires on top of the mag go to top of the cooresponding cyliners - WRONG. Then I looked at the back of the mags and found wire number 1 and counted clockwise figuring these are wires 1,2,3,4 and go to the same number cylinder - WRONG. I could tell this was wrong because the wire lengths didn't fit well. Just didin't seem designed right.

So I emailed champion and in less than a couple hours they emailed me back and said, look at the caps that screw onto the plugs. They are etched with the cylinder number. T1 means top cylinder 1. B2 means bottom cylinder #2.

So I laid out the wires like this and it was obviously correct. The wire lengths are perfect and line up well.
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