Yamaha F200B Service Manual

5-59
ELEC
Electrical system
Checking the engine temperature
sensor
1. Remove the flywheel magnet cover.
2. Disconnect the engine temperature sen-
sor coupler a.
3. Turn the engine start switch to ON, and
then measure the input voltage at the
engine temperature sensor coupler.
4. Turn the engine start switch to OFF.
5. Remove the flywheel magnet. See
“Removing the flywheel magnet” (7-16).
6. Remove the engine temperature sensor.
7. Place the engine temperature sensor in a
container of water and heat the water
slowly.
8. Measure the engine temperature sensor
resistance at the specified temperatures.
9. Install the engine temperature sensor,
and then tighten it to the specified torque.
10. Remove the engine ECM cover.
11. Remove the engine ECM, and then dis-
connect the engine ECM coupler b.
12. Check the wiring harness for continuity.
13. Connect the engine ECM coupler.
NOTICE: Make sure that the rubber
seal is installed properly in the engine
ECM coupler.
14. Install the engine ECM, and then tighten
the engine ECM bolts to the specified
torque.
Engine temperature sensor input voltage:
Black/Yellow (B/Y)–Black (B)
4.75–5.25 V
PORT
a
B
B/Y
Engine temperature sensor resistance
(reference data):
Black/Yellow (B/Y)–Black/Yellow (B/Y)
54.2–69.0 kΩ at 20 °C (68 °F)
3.12–3.48 kΩ at 100 °C (212 °F)
Engine temperature sensor:
15 N·m (1.5 kgf·m, 11.1 ft·lb)
Wiring harness continuity:
a Terminal 1–b Terminal 17
a Terminal 2–b Terminal 18
b
b
18 17
a
1
2

Yamaha F200B Specifications

General

Brand	Yamaha
Model	F200B
Category	Outboard Motor
Language	English