1993 Johnson Evinrude "ET" 9.9 thru 30 Service Repair Manual, P/N 508282, Page 110Get this manual

1993 Johnson Evinrude "ET" 9.9 thru 30 Service Repair Manual, P/N 508282, Page 110

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Spark Plug Information The spark plugs should removed and examinedspark plug should replaced if the electrodes badly worn, if it has cracked insulator, is badly fouledBefore installing the spark plug