1987 Johnson/Evinrude CU Outboards 35A thru 55 Service Repair Manual P/N: 507616, Page 125Get this manual

1987 Johnson/Evinrude CU Outboards 35A thru 55 Service Repair Manual P/N: 507616, Page 125

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Spark Plug Information The spark plugs should removed and examinedThe spark plugs shoud replaced if the electrodes badly worn, have cracked insuator, bady fouedBefore installing the high tension lead