TRIM Gauge with E-TEC 90
Posted: Sun Jan 07, 2018 10:23 am
The Evinrude legacy E-TEC 90-HP (and other three-cylinder in-line) engines do not provide engine trim in their NMEA-2000 data from the EMM. If an individual gauge to display engine trim position is desired, an analogue or conventional gauge must be used. If the wiring harness for the rigging was chosen to be the I-COMMAND WIRING HARNESS, there will be a problem: no wiring is provided for a conventional gauge. This can be overcome by modification to the wiring harness. This article will explain the modification.
The stock Evinrude I-COMMAND WIRING HARNESS looks like this:
Note that there is embedded in the harness at some point a 47-Ohm 5-Watt resistor. To modify the harness, the resistor must be located. Typically the resistor can be found by careful visual and tactile examination of the cable. Once the resistor is located, it must be cut out of the circuit. The TRIM SENSOR circuit must be extended with a new conductor and fitted with a ring terminal conductor. The modified cable will look like this:
Note that you can leave the 47-Ohm resistor connected to the VIOLET (Switched 12-Volt Accy) circuit, but carefully insulate the free end. It will be difficult to get new wire with WHITE-with-TAN-Stripe color insulation; just use wire with WHITE insulation and mark the conductor with some brown tape cut into small stripes near the ring terminal end.
A conventional trim gauge can now be connected to the modified cable. The new conductor you added goes to the S terminal post; the exiting BLACK conductor with ring terminal goes to the G terminal post; the exiting VIOLET conductor with ring terminal goes to the I (ignition key) terminal post.
Please be aware that in the Evinrude gauge series, the ICON Accessory gauge for TRIM cannot be used with this wiring. That gauge contains a stepper motor and is intended only for connection to an ICON Pro RPM gauge. Only a conventional trim gauge can work in this application. Choose the style of the gauge to match other devices on your helm panel.
The stock Evinrude I-COMMAND WIRING HARNESS looks like this:
Note that there is embedded in the harness at some point a 47-Ohm 5-Watt resistor. To modify the harness, the resistor must be located. Typically the resistor can be found by careful visual and tactile examination of the cable. Once the resistor is located, it must be cut out of the circuit. The TRIM SENSOR circuit must be extended with a new conductor and fitted with a ring terminal conductor. The modified cable will look like this:
Note that you can leave the 47-Ohm resistor connected to the VIOLET (Switched 12-Volt Accy) circuit, but carefully insulate the free end. It will be difficult to get new wire with WHITE-with-TAN-Stripe color insulation; just use wire with WHITE insulation and mark the conductor with some brown tape cut into small stripes near the ring terminal end.
A conventional trim gauge can now be connected to the modified cable. The new conductor you added goes to the S terminal post; the exiting BLACK conductor with ring terminal goes to the G terminal post; the exiting VIOLET conductor with ring terminal goes to the I (ignition key) terminal post.
Please be aware that in the Evinrude gauge series, the ICON Accessory gauge for TRIM cannot be used with this wiring. That gauge contains a stepper motor and is intended only for connection to an ICON Pro RPM gauge. Only a conventional trim gauge can work in this application. Choose the style of the gauge to match other devices on your helm panel.