Yamaha F100A - Service Points; Thermostat Inspection

5-24
POWR
E
CYLINDER HEAD ASSY.
SERVICE POINTS
Thermostat inspection
1. Inspect:
● Thermostat
Damage/valve does not open →
Replace.
2. Measure:
● Valve operating temperature
● Valve lift a
Out of specification → Replace the
thermostat.
Water temperature Valve lift
Below
60˚C (140˚F)
0 mm
(0 in)
Above
70˚C (158˚F)
Min. 3 mm
(0.12 in)
Measuring steps:
● Suspend the thermostat in a container
filled with water.
● Slowly heat the water.
● Place a thermometer in the water.
● While stirring the water, observe the
thermometer’s indicated temperature.
a