Yamaha XT250X - Checking the Carburetor Warmer

ELECTRICAL COMPONENTS
7-47
e. Check the thermo switch for continuity.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS28310
CHECKING THE CARBURETOR WARMER
1. Check:
● Carburetor warmer element resistance
Out of specification → Replace.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Remove the carburetor warmer leads from
the carburetor.
b. Connect the pocket tester (Ω × 1) to the car-
buretor warmer as shown.
c. Measure the carburetor warmer resistance.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
A. When the water temperature increases
B. When the water temperature decreases
Carburetor warmer resistance
4.7–9.5 Ω 20°C (68°F)
Pocket tester
90890-03132
Positive tester probe
Carburetor warmer terminal “1”
Negative tester probe
Carburetor warmer body “2”