1999 "EE" Evinrude 70HP 4-Stroke Service Manual, P/N 787023, Page 69Get this manual
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Repeat Step before removing pressure adapter or disconnecting any fuel lines
10Tee pressure gauge into vapor separator outlet and repeat Step or 9Gauge should read about the same as in Step above Yesreplace high pressure fuel filter Nosuspect plugged low pressure fuel filter, plugged filter screen on high pressure pump, or damaged high pressure pumpRepair as necessary
High Pressure Pump Voltage Verification]11Connect voltmeter to fuel pump connectorred to pink wire and black to blackwhite wireObserve meter reading while turning key switch ONMeter should show battery voltage for seconds Yesreplace fuel pumpvapor separator assembly[]] Nomove voltmeter black lead to clean engine ground and turn key switch ON If voltmeter shows battery voltage, replace ECU If no voltage is present, replace or repair engine harness