1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Repair Manual P/N 507947, Page 109Get this manual

1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Repair Manual P/N 507947, Page 109

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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

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