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All those plugs tell you is what the engine was running right before it was shut off. You let it idle for a few seconds before shutting it off? Then you're lean at idle (which is expected).
If you actually want to test the engine, you need to rev it to the desired range, then shut it off and coast to a stop, then look at the plugs right away. Not the most convenient way of tuning.
Really? :braincramp: