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Short Version- I believe the word you're looking for is "Quenching." Use NGK ZFR4F-11 Spark Plugs ONLY! Anything and Everything else is a problem particularly on the VX, which goes into Lean Burn Mode only after reaching Full operating Temperature, which you can't really tell from the gauge reading. The lean mixture is harder to ignite and “other” plugs don’t work well. If you're interested, the long version of this post details the problem.
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