1990 Johnson Evinrude "ES" 40 thru 55, P/N 507872, Page 98Get this manual
FUEL SYSTEM TROUBLE CHECK CHART
ENGINE WILL NOT START STARTS, WILL NOT IDLE WILL NOT IDLE SLOWLY SPITS AT IDLE, LEAN ENGINE RICH AT IDLE EXCESSIVE OIL USE STALLS ON ACCELERATION SURGES AT HIGH SPEED RUNS RICH AT HIGH SPEED LOSS OF W.O.T RPM CARBURETOR FUEL SPITBACK REFER TO OWNER MANUAL