CARBURETOR HEATING SYSTEM ELEC – +
ÅThe thermo switch circuit is open. ı The thermo switch circuit is closed.
Test step | Water temperature | Continuity | |||
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1 | Less than 23 ± 3 ˚C | YES | |||
(73.4 | ± 5.4 ˚F) | ||||
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2 | More than 23 ± 3 ˚C | NO | |||
(73.4 | ± 5.4 ˚F) | ||||
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3 | More than 12 | ± 4 ˚C | NO | ||
(53.6 | ± 7.2 | ˚F) | |||
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4 | Less than 12 ± 4 ˚C | YES | |||
(53.6 | ± 7.2 | ˚F) | |||
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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
Carburetor heater body 2
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| Carburetor | Tester selector |
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| heater resistance | position |
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| 6 ~ 10 Ω at | Ω ⋅ 1 |
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| 20 ˚C (68 ˚F) | |
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