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

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EAS00462

CHECKING THE THERMOSTAT

1. Check:
9 thermostat 1
Does not open at 80.5 – 83.5° C (176.9 –
182.3° F) → Replace.
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.
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. Afaulty thermostat could cause seri-
ous overheating or overcooling.
2. Check:
9 thermostat housing cover
9 thermostat housing
Cracks/damage → Replace.
EAS00470

DISASSEMBLING THE WATER PUMP

1. Remove:
9 water pump cover
9 gasket
9 O-ring
5-6
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