Yamaha YFM660RN Service Manual page 320

*
6.Thermo switch 1
Remove the thermo switch from the radia-
tor.
Connect the pocket tester (Ω × 10) to the
thermo switch 1.
Immerse the thermo switch in coolant 2.
Check the thermo switch for continuity.
While heating the coolant use a thermome-
ter 3 to record the temperatures.
Water temperature
Test
step
Thermo switch
0 ~ 92 ± 3 °C
1
(32 ~ 197.6 ± 5.4 °F)
More than 98 ± 3 °C
2
(208.4 ± 5.4 °F)
98 ± 3 to 92 ± 3 °C
3* (208.4 ± 5.4 to
197.6 ± 5.4 °F)
Less than 92 ± 3 °C
4*
(197.6 ± 5.4 °F)
Tests 1 & 2; Heat-up tests
Tests 3* & 4*; Cool-down tests
: Continuity
WARNING
Handle the thermo switch with special
care.
Never subject it to a strong shock or
allow it to be dropped. Should it be
dropped, it must be replaced.
Thermo switch:
28 Nm (2.8 m • kg, 20 ft • lb)
Three bond sealock
*
C0NTINUITY
Good
condition
×
×
×
: No continuity
®
#10
GOOD
CONDITION
8 - 39
COOLING SYSTEM
BAD CONDITION
Replace the thermo switch 1.
– +
ELEC