Mercury V8 250

Terminal Test Probe Kit Bosch P/N MM‑ 46523
a - Exhaust gas temperature (EGT)
sensor connector
b - PCM connector B
c - PCM connector C
Connector Pin Wire Color Function PCM
53172
B
A
A Black/orange Sensor ground A (–) CE1
B Brown/white Exhaust gas temperature BE1
EGT Sensor Removal
1. Remove the engine cowls. Refer to the appropriate service manual.
2. Remove the electrical panel cover.
• On V8 models, pull the top aft until the pins are clear of the grommets, and then lift up.
V8 models
a - Pull aft
b - Lift up
• On V6 models, pull the panel aft.
100A
100B
BLK/ORN
BRN/WHT
BRN/WHT
BLK/ORN
H4
E1
A1
E1
M4
A1
A
B
65450
a
b
c
A B
C
D E F G H
J
K
AB
C
DEFGH
J
K
1
3
2
4
L
M
L
M
M
A
4
1
A
B
C
D
E
F
G
H
1
2
3
4
A
B
C
D
E
F
G
H
A
H
1
4
a
b
63580
Sensors
90-8M0146617 eng JULY 2018 © 2018 Mercury Marine Page 5A-21