Evinrude E-TEC 300 - Engine Temperature Sensor Test; Air Temperature Sensor (At) Test; Knock Sensor Test

95
ELECTRICAL AND IGNITION
SENSOR TESTS
6
Connect red meter lead to terminal “A” and black
meter lead to terminal “C.” Rotate the sensor lever
through its range of travel. Resistance reading
must change evenly as the sensor lever is moved.
Connect red meter lead on terminal “B” and black
meter lead to terminal “C.” Rotate the sensor
lever. Resistance reading must change evenly as
the sensor lever is moved.
Engine Temperature Sensor Test
Remove the electrical connector from the engine
temperature sensor.
Use a digital multimeter to measure sensor resis-
tance.
Air Temperature Sensor (AT) Test
Remove the electrical connector from the air tem-
perature sensor.
Use a digital multimeter to measure sensor resis-
tance.
Knock Sensor Test
There are no tests for the knock sensor. If
Evinrude Diagnostics reports Service Code 7 or 8,
replace with a new sensor.
Make sure sensor retaining screw is tightened to a
torque of 14 to 16 ft. lbs. (19 to 22 N·m).
Engine Temperature Sensor Resistance
680 ± 5% @ 212°F (100°C)
10000 ± 1% @ 77°F (25°C)
32654 ± 2.5% @ 32°F (0°C)
1. Engine temperature sensor (2) 004196
1
AT Sensor Resistance
680 ± 5.25% @ 212°F (100°C)
10000 ± 1.5% @ 77°F (25°C)
32654 ± 3.0% @ 32°F (0°C)
1. AT sensor 004216
1