1994 Johnson Evinrude "ER" 90 LV 120 thru 140, 185 thru 225, 250, 300 Service Manual P/N 500612, Page 368Get this manual

1994 Johnson Evinrude "ER" 90 LV 120 thru 140, 185 thru 225, 250, 300 Service Manual P/N 500612, Page 368

Tachometer CircuitV6, If the VRO "no oil" warning signal is in question, or if the boat's tachometer is not working, test
should increase approximately voltDisconnect the VRO pump's 4-pin Amphenol connectorVoltage should increase approximately
volts If the voltmeter shows higher voltage than specified on both components, replace the rectifierregulator If the voltmeter
shows higher voltage than specified on one component, replace that component6Complete all circuits disconnected for this
testLeave adapter box in the circuitDo not energize primer solenoid when performing Steps 7, 8, and 9f111 7With the engine
not running and the key switch in the "ON" position, note the voltmeter reading If the voltmeter does not show voltage, the
tachometer circuit is okayCheck the warning horn circuitRefer to Warning Horn, Section If the voltmeter shows voltage, go
to Step 8f12I 8Separate the rectifierregulator gray lead bullet connectorRemove the voltmeter red lead from jack "c" and
connect it to the rectifierregulator gray leadWith the engine not running and the key switch "ON," note the voltmeter reading