Quote:
Originally Posted by Steve Tinker
I can understand mileage affecting plug degredation, but the time limit is not at all clear to me.
What affects the efficiency of a plug made up of metal alloys and ceramics over a 4 year period screwed into an alloy cylinder head, unless electrolytic action between the threads of the plug and cylinder head is a potential probem.
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New electrode has a sharp edge that makes it easier for the spark to jump to ground.
Worn electrode rounds & smooths that edge making a less concentrated arc.
I did read somewhere the time limit was to minimize danger of stripping head threads while removing sparkplugs.
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OE engine rebuilt,3.6 litre LN Engineering billet sleeves,triple row IMSB,LN rods. Deep sump oil pan with DT40 oil.
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Mean Motor Scooter
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