1997 Johnson Evinrude "EU" 9.9 thru 30 2-Cylinder Service Repair Manual, P/N 507263, Page 98Get this manual
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FUEL SYSTEM TROUBLE CHECK CHART
RUNS RICH AT HIGH SPEED
LOSS OF W.O.T RPM
CARBURETOR FUEL SPITBACK
REFER TO SECTION 1
REFER TO OWNER MANUAL