Mercury 225 EFI Service Manual page 384

POWERHEAD
2. Install thermostat assembly into each cylinder head.
3. Install temperature sensors into STARBOARD and PORT cylinder heads.
c
b
a
a - Temperature Sensor (Port) (Over-
heat)
b - Temperature Sensor (Analog Tem-
perature Gauge)
c - Bolt [Torque to 17 lb. ft.
(23. Nm)]
NOTE : The temperature sensors provide continuous temperature information to the ECM
while the engine is running. Should temperature reach approximately 180 F 82 C), the
ECM will activate a warning horn and warning light.
Page 4A-72
d
e
f
d - Port Thermostat
e - Starboard Thermostat
f - Temperature Sensor (Starboard)
(Overheat)
90-884294 OCTOBER 2001
59037