Checking The Thermostat; Disassembling The Water Pump - Yamaha T135SE Service Manual

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Yamaha T135 Service Manual
5-6
COOLING SYSTEM
EAS00462

CHECKING THE THERMOSTAT

1. Check:
9thermostat 1
Does not open at 80.5 – 83.5°C (176.9 –
182.3°F) → Replace.
MMMMMMMMMMMMMMMMMMMMMMMM
a. Suspend the thermostat in a container filled
with water.
b. Slowly heat the water.
c. Place a thermometer in the water.
d. While stirring the water, observe the thermo-
stat and thermometer's indicated tempera-
ture.
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1 Thermometer
2 Water
3 Thermostat
4 Container
å Fully closed
∫ Fully open
NOTE:
If the accuracy of the thermostat is in doubt,
replace it. A faulty thermostat could cause seri-
ous overheating or overcooling.
2. Check:
9thermostat housing cover
9thermostat housing
Cracks/damage → Replace.
EAS00470

DISASSEMBLING THE WATER PUMP

1. Remove:
9water pump cover
9gasket
9O-ring
COOL