Service Manual 5007211_Evinrude E-TEC 75-90 HP Electrical And Ignition [Techometer Circuit Tests]

IMPORTANT: Make sure all outboard and boat wiring and connectors are in good condition.

Check voltage at the battery. Use this reading as a reference for battery voltage.

1. Purple lead
2. Black lead
3. Gray lead

STEP 1
Connect the red meter lead to the tachometer purple wire and the black meter lead to the tachometer black wire (key ON, outboard NOT running).

• If meter shows battery voltage, go to STEP 2.
• If meter shows less than battery voltage, check the purple, red/purple, and black wiring circuits, fuse, key switch, and battery connections.

STEP 2
Disconnect instrument harness gray wire and black wire at tachometer. Set Fluke 29 Series II meter, or equivalent, to Hz scale. Connect meter
between gray wire and black wire. With outboard running at 1000 RPM, meter should indicate 90 to 105 Hz.

• If meter reads 90 to 105 Hz, replace tachometer.

• If meter reads low or no signal, confirm output on gray wire at pin 16 of EMM J1-A connector.
  – Reading OK – Check condition of tachometer circuit (gray wire). Repair as needed.
  – Reading not OK – Check connection at EMM; replace faulty EMM.