1998 Johnson Evinrude "EC" 90, 115 SPL Service Manual, P/N 520209, Page 90Get this manual
FUEL SYSTEM TROUBLE CHECK CHART FUEL TANK AND FILTER
VRO SYSTEM
CARBURETOR
ENGINE WILL NOT START STARTS, WILL NOT IDLE WILL NOT IDLE SLOWLV 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.TRPM CARBURETOR FUEL SPITBACK