Spark Plug Polarity?
in 912 / 914 Technical Questions
10 years ago
I am in the midst of my first annual Condition Inspection on my RV-12 ELSA (120 hours TTSN). All eight of the original spark plugs were a consistent satin tan color - amazing engine performance! I ran the engine at @ 4,000 rpm just before shutdown per ROTAX-OWNER's recommendation - maybe that helped give me the nice clean plugs? :)
While reinstalling the spark plugs, I wondered if there was any benefit in reinstalling the plugs in different cylinders to account for magneto polarity. On Lycs/Conts, I usually swapped the plug locations in a systematic manner to even out polarity wear at the electrodes. Is this procedure applicable to the ROTAX 912ULS?
Is there any advantage to at least swapping plugs "top-to-bottom-to-top" etc to account for potential lower plug fouling? Since my plugs are so clean, even that doesn't seem necessary.
While reinstalling the spark plugs, I wondered if there was any benefit in reinstalling the plugs in different cylinders to account for magneto polarity. On Lycs/Conts, I usually swapped the plug locations in a systematic manner to even out polarity wear at the electrodes. Is this procedure applicable to the ROTAX 912ULS?
Is there any advantage to at least swapping plugs "top-to-bottom-to-top" etc to account for potential lower plug fouling? Since my plugs are so clean, even that doesn't seem necessary.
