1998 Johnson Evinrude "EC" 40 thru 55 2-Cylinder Service Manual, P/N 520206, Page 297Get this manual
Circuit Verification, Instrument Harness To make sure the OMC System Check engine monitor can alert the operator during LOW OIL, NO OIL, FUEL RESTRICTION, or engine OVERHEAT condition, it is very important to verify the condition of the sensors and associated wiringTest the engine monitor regularly and anytime you suspect an alert situation has been missed
INote The INotel
instrument harness must be connected to the engine before performing the following testsVerify the condition of all wiring and connectors before proceedingThe warning horn will not sound while in the diagnostic
rn INote Iwarning circuitsmade with the appropriate terminals Use jumper wires to test the
System Check Gauge