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Old 01-20-2001, 11:36 AM
stevebfl stevebfl is offline
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Join Date: Mar 2000
Location: Gainesville FL
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The difference between the W9DCO and W9DC is in the diameter of the central electrode not the heat range. The heat range is gauged by the second digit "9". I think the plug would be colder if it were an "8". In other words W8DCO.
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Steve Brotherton
Continental Imports
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