1997 Johnson Evinrude "EU" 125C, 130, 200, 225, 250 90 LV Service Manual, P/N 507269, Page 374Get this manual
Circuit Verification, Instrument Harness To make sure the OMC System CheckTM 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 missedI Note The instrument harness must be connected to the engine
before performing the following testsVerify the condition of all wiring and connectors before proceedingINotel The warning horn will not sound while in the diagnostic
I Note Use jumper wires made with the appropriate terminals to test the warning circuits