Carburetor Heater Inspection - Yamaha TT-R50E Owner's Service Manual

CARBURETOR HEATING SYSTEM
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È The thermo switch circuit is open.
É The thermo switch circuit is closed.
Test step Water temperature Continuity
Less than 16 ± 3 °C
1
(60.8 ± 5.4 °F)
More than 16 ± 3 °C
2
(60.8 ± 5.4 °F)
More than 11 ± 3 °C
3
(51.8 ± 5.4 °F)
Less than 11 ± 3 °C
4
(51.8 ± 5.4 °F)
Test steps 1 & 2: Heating phase
Test steps 3 & 4: Cooling phase
WARNING
• Handle the thermo switch with special
care.
• Never subject the thermo switch to
strong shocks. If the thermo switch is
dropped, replace it.
• Check the thermo switch operation.

CARBURETOR HEATER INSPECTION

1. Inspect:
• Carburetor heater resistance
Out of specification → Replace.
Tester (+) probe →
Carburetor heater terminal 1
Tester (–) probe →
Carburetor heater body 2
Carburetor
heater resistance
4.6 ~ 9.6 Ω at
20 °C (68 °F)
– +
ELEC
YES
NO
NO
YES
Tester selector
position
Ω × 1