Yamaha YTZ250S 1986 Service Manual page 123

2
Thermostatic switch
Remove the thermostatic switch.
Immerse the thermostatic swich in the water
as shown. While heating the water, check the
continuity at each temperature.
Test
Water temperature
step
0-98°C (32-208.4°F)
2
more than 105±3°C
(more than 221.0±37.4°F)
3*
105 to 98°C
(221 to 208.4°F)
4*
less than 98°C
(less than 208.4°F)
Test 1 & 2; Heat-up tests
Test 3* & 4*; Cool-down tests
105°±3°C
(221.0±37.4°F)
CD
bbbd6b
1. Temperature gauge
2. Thermostatic switch
3. Pocket tester
Pocket tester
(nx1)
Discontinuity
Continuity
Continuity
Discontinuity
o
X H )
@
+
I
Faulty
1--.
Replace the thermostatic
. ! ~
switch
Q
5-13
3
C.D.I Magneto (Lighting coil) test
Refer to "LIGHTING SYSTEM
Troubleshooting NO.3"
Q
4 Connectors check-up
Refer to "LIGHTING SYSTEM
Troubleshooting NO.4"
1
Wrong
1
Q
Replace pilot light checker.
CD
Pilot light checker
.1
Correct
1