Your description matched what I found in the 10-20 overhaul manual. It had a great picture, however, when I opened it the 'T' didn't match the firing order.
The T was in the upper left corner if looking at the mag. #1 was at TDC which I confirmed by the notch on the bell housing and the mark on the flywheel AND visually by watching the #1 piston.
I ran the spark plug wire from the top left position to the #1 piston and went clockwise from there in the firing order. I assumed that the rotor turned clockwise, I better check that.
An odd issue is that I see that the placement of the spark plug wires on the mag is different in the 10-20 overhaul manual vs the operators manual. I assume that this doesn't really matter as long as where ever #1 TDC is that the spark plug wire comes from there and the correct firing order.
I didn't get any fire tonight when I tried with the new plug wire order. I put the wire back in the first configuration and didn't get any fire that way either so I gave up for the night.
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