3. Measure the resistance when the specified temperature is reached. If out of specification, replace the sensor.
DMT 2004 Digital Multimeter 91‑892647A01
a - Engine coolant temperature sensor
Meter Test Leads
Meter Scale Temperature Reading
Red Black
Black/blue Green/yellow Auto
5 °C (41 °F) 4.24 kΩ–4.86 kΩ
25 °C (77 °F) 1.90 kΩ–2.10 kΩ
100 °C (212 °F) 166 Ω–204 Ω
ECT Sensor Installation
1.
With a new O‑ring in place, thread the ECT sensor into the engine.
a - ECT sensor
b - Flywheel
c - Engine lifting eye
2. Tighten the sensor to the specified torque.
Description Nm lb‑in. lb‑ft
ECT sensor 4.0 35.4 –
3. Connect the ECT sensor 2‑pin connector to the engine harness.
4.
Use the reusable cable tie to secure the sensor lead and the other wires to the electrical bracket.
5. Install the air box and recoil starter assembly.
• It is easiest to install the recoil starter and air box together.
•
Refer to Section 8A ‑ Recoil Starter and Section 3C ‑ Air Box Installation.
Ignition
Page 2A-8 © 2018 Mercury Marine 90-8M0125265 eng NOVEMBER 2017
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