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    1971 Mercury Outboard 7.5 HP Spark Plug Question

    Thunderbolt Ignition Serial# 3020217<br /><br />Can anyone direct me where I can find the following?<br /><br />What is the point gap?<br />What is the spark-plug gap?<br />Type of spark-plug recommended?<br /><br />Any information would be appreciated.<br /><br />Thank you
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