1998 Johnson Evinrude "EC" 150, 175 FFI Service Manual, P/N 520211, Page 75Get this manual
IExcessive Smoking SYSTEMCOMPONENT CAUSES
Hole in Lift Pump Diaphragm
ACTIONS
Fuel present in lift pump pulse lines See Action StepsFuel System Fuel flows from PORT Vapor Hose
Vapor Separator Vent Valve Stuck Open Fuel System Poor Quality Fuel Injector(s) Stuck Open
Substitute known good fuel Isolate using OMC Diagnostics Software andor pressure testSee Action Steps Fuel System and Section 5
Improperly Connected Hoses at Fittings
FuelOil
Engine may start if fuel and oil hoses are swapped, but fuel system will be filled with oil Use OMC Diagnostic Software to extract codes Monitor using voltmeter or timing light See Action StepsOil System Check programming using OMC Diagnostic SoftwareSee Section Monitor using Timing Lightsee Action StepsFuel Systemcheck for loose connections or damaged crank position sensorPossible Code 15replace ECU Perform Oil System LeakDown Test See Section 8