1998 Johnson Evinrude "EC" 25, 35 HP 3-Cylinder Outboards Service Repair Manual P/N 520205, Page 43Get this manual
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20-Hour Check
cylinder head screws and spark plugs
Cylinder Head ScrewsFollow torque sequence outlined in Powerhead, Section Spark PlugsLoosen spark plug 14 turn before applying torque 4 C