Thermostat Inspection; Service Points - Yamaha F20A Service Manual

POWR
OIL FILTER CARTRIDGE, THERMOSTAT, AND
EXHAUST COVER

SERVICE POINTS

Thermostat inspection

1. Measure:
Valve operating temperature
Valve lift
Out of specification → Replace the
thermostat.
Water temperature
60 ˚C (140 ˚F)
70 ˚C (158 ˚F)
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.
5-32
Valve lift
Below 0 mm
Above Min. 3 mm
(0.12 in)
E
(0 in)