1998 Johnson Evinrude "EC" 150, 175 FFI Service Manual, P/N 520211, Page 50Get this manual
The sensor feeds the flywheel encoder data to the ECU, which calculates crank position and engine speedThe ECU generates tachometer signal, and controls fuel injector and ignition operationThe sensor is located on the port side of the flywheel cover just in front of the starter motor, and requires 0.050 0.005 in(1,27 0,127 mm) sensor-to-flywheel air gap to operate properlyIf the crankshaft sensor or its circuit fails, the engine will not runIf the air gap is incorrect, the engine will run erraticallyA sensor that is damaged or out of adjustment will turn on the "CHECK ENGINE" light and store service code, but only if the failure occurs while the engine is running INote Crankshaft sensor operation can be verified by the Engine
Monitoring Screen of the OMC Diagnostic ProgramRPM on the screen should reflect engine RPM while cranking
Oil System Components
Oil system components are located at the front of the crankcase behind the fuel bracket, and on each intake manifoldOil Pump