1998 Johnson Evinrude "EC" 9.9 thru 30 HP 2-Cylinder Outboards Service Repair Manual P/N 520204, Page 260Get this manual
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Jet Drive Adjustments Impeller Clearance Adjustment If loss of performance combined with higher than normal wide-open-throttle RPM is noted (or the RPM limiter actuates), check for wear between the im