106
ELEC
CARBURETOR HEATER SYSTEM
• Immerse the thermo switch in the water
3
.
• Check the thermo switch for continuity. Note
the temperatures while heating the water
with the temperature gauge
4
.
Test step Water temperature
Good
condition
1
Less than 23 ± 3 °C
O
2
More than 23 ± 3 °C
3
More than 12 ± 4 °C
4
Less than 12 ± 4 °C
O
Test 1 & 2: Heat-up test
Test 3 & 4: Cool-down test
O
: Continuity
: No continuity
• Is the thermo switch OK?
OFF
ON
Thermoswitch
12 ± 4 °C
Thermoswitch
23 ± 3 °C
Replace the thermo
switch.
YES
NO
Replace the carbure-
tor heater.
YES
NO
5. Carburetor heater
• Remove the carburetor heater from the car-
buretor body.
• Connect the pocket tester to the carburetor
heater.
Tester (+) lead
→
Heater terminal
1
Tester (–) lead
→
Heater body
2
• Measure the heater resistance.
Carburetor heater resistance:
12 V 30 W: 6 ~ 10
at 20 °C (68 °F)
• Is the carburetor heater OK?
EASB0041
6. Wiring
• Check the entire carburetor heater system’s
wiring.
Refer to "CIRCUIT DIAGRAM".
• Is the carburetor heater system’s wiring
properly connected and without defects?
The carburetor heater
system circuit is OK.
Properly connect
or repair the carbure-
tor heater system’s
wiring.
NO
YES
EASB0042
