1979 Johnson Outboards V-4 Models Factory OEM Service Repair Manual P/N JM-7909, Page 61Get this manual

1979 Johnson Outboards V-4 Models Factory OEM Service Repair Manual P/N JM-7909, Page 61

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Adjust the air gap of the spark tester to 12 inch (12and connect the tester leads to the high tension leadsSecure the other end of the spark tester to clean engine ground See Figure 4-17 SAFETY WARNIN

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