1979 6 HP Johnson Outboard Repair and Service Repair Manual PN JM-7904, Page 36Get this manual

1979 6 HP Johnson Outboard Repair and Service Repair Manual PN JM-7904, Page 36

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SPARK TEST Remove the high tension leadeach spark plugprevent damage to the spring terminal the high tension lead, twist and the coverSee Figure 4-12
Adjust the air gapthe spark tester to 1 inch