Hello all

changed the plugs yesterday. The old ones (NGK BP6ET) are a nice
brick-brown colour. What can this tell me about the state of the engine? My
repair and maintainance manual only gives different hues of gray, from
sooty black to white, but no browns.

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    Johan Nyberg, Sweden N 59o E 17o 25"
    '86 Caravelle C
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