1976 Johnson Outboard Motor 40 HP Service Repair Manual P/N JM-7609, Page 33Get this manual

1976 Johnson Outboard Motor 40 HP Service Repair Manual P/N JM-7609, Page 33

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SPARK PLUGS Spark plugs having the proper heat range are very important for peak operation of the motorSpark plugs classified according to the temperatures at which they are designed to operate, or CO

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