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Old 08-20-2002, 10:53 PM
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Gilly Gilly is offline
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Join Date: Mar 2001
Location: Evansville WI
Posts: 9,616
The "O" indicates a heavy duty electrode. I recomend the "O" series where ever available, regardless of what the original spec called for, so on an older model if it calls for a H8DC, I would recommend the H8DCO. If the "O" plug was not available I would feel fine using the original H8DC though.
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