Yamaha YFM660FP Service Manual page 394

*
6.Thermo switch 2
Remove the thermo switch 2 from the
●
radiator.
Connect the pocket tester (Ω × 10) to the
●
thermo switch 2 1.
Immerse the thermo switch 2 in coolant 2.
●
Check the thermo switch 2 for continuity.
●
While heating the coolant use a thermome-
ter 3 to record the temperatures.
Water temperature
Test
step
Thermo switch 2
Less than 75 ± 3 °C
1
(167 ± 5.4 °F)
More than 75 ± 3 °C
2
(167 ± 5.4 °F)
More than 68 °C
3*
(154.4 °F)
Less than 68 °C
4*
(154.4 °F)
Tests 1 & 2; Heat-up tests
Tests 3* & 4*; Cool-down tests
: Continuity
WARNING
Handle the thermo switch 2 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 2:
28 Nm (2.8 m • kg, 20 ft • lb)
Three bond sealock
*
C0NTINUITY
Good
condition
×
×
×
: No continuity
®
#10
GOOD
CONDITION
9 - 50
COOLING SYSTEM
BAD CONDITION
Replace the thermo switch 2.
– +
ELEC