Analog Temperature Sensor - Mercury 150 EFI Service Manual

COOLING

Analog Temperature Sensor

TAN/BLACK sensor lead (in port analog temperature sensor) provides signal for optional
temperature gauge.
An ohms test of the analog temperature sensor (in port cylinder head) would be as follows:
Insert digital or analog ohmmeter test leads into both TAN/BLACK sensor leads. With en-
gine at temperature (F ) indicated, ohm readings should be as indicated 10%.
270
255
240
225
210
195
180
165
150
135
120
105
90
75
60
45
30
15
0
0.0 0.2 0.4 0.6
Between Black and each TAN/BLK wire.
Between each lead and ground
Between each TAN/BLK wire
Page 4B-4
Temperature Sensor
0.8 1.0 1.2 1.4 1.6
Resistance (kW)
Temperature Sensor
1.8 2.0 2.2 2.4 2.6
No
Continuity
No
Continuity
Resistance will vary with temperature
2.8 3.0 3.2
90-883278 JULY 2001