Removing Thermostat - TOHATSU TLDI MD 115A SERIES Service Manual

Power Unit

8) Removing Thermostat

Loosen thermostat cap mounting bolts 2, remove them,
1.
remove cap 1 , and take out thermostat 3.
If thermostat cap is seized, tap lightly using a
plastic hammer and then remove.
Inspection of Thermostat
1) Put thermostat in the vessel containing water, heat it,
and measure the temperature at which the thermostat
starts to open.
Valve Opening Temperature :
58.5 - 61.5˚C (136.5 - 143.5˚F)
Valve Full Open Temperature :
73.5 - 76.5˚C (163.5 - 170.5˚F)
Replace thermostat if the valve is open even a
little at ambient temperature.
2. Measure valve lift of thermostat when prescribed
temperature has been reached. Replace if the length is
less than specified value.
Water Temperature
75˚C (167˚F)
5-30
Valve Lift a
4.5mm (0.177in) or over
3 3
2
1
3
a
TLDI 115A 2007