A spark plug has a metal threaded shell, electrically isolated from a central electrode by a porcelain insulator. The central electrode, which may contain a resistor, is connected by a heavily insulated wire to the output terminal of an ignition coil or magneto.
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Prediction #5: At least 2 people will be fired or resign from the Trump Cabinet/staff in the first half of 2017. ââ. Prediction #26: Mid 2017 will be a really good time for investments as the economy takes off again and regains a lot of ground due to new investment opportunities and economic growth.