Inspection Of Propeller; Inspection Of Thermostat - TOHATSU MFS25 Service Manual

26) Inspection of Propeller

1. Check propeller blades and spline for cracks, damages,
wear and corrosion. Replace if necessary.

27) Inspection of Thermostat

1. Remove fuel cooler.
Remove cover 1 and thermostat 2.
2.
Hang thermostat 2 in the water contained in vessel.
3.
4. Put thermometer in the water, and warm up water to
measure valve opening temperature.
Put a piece of thread in the closed valve gap
and hang it in the water. Valve opening moment
can be known when thermostat is released to
drop due to opening with rise of temperature.
Valve Opening Temperature :
60±1.5° ( 140±3°F ) ( Valve starts to open at this temperature.)
5. Measure valve lift of thermostat when prescribed
temperature has been reached. Replace if valve lift is less
than specified value.
Water Temperature
75° ( 167°F )
6. Install thermostat, new gasket and cover.
Thermostat Cover Bolt :
6 N·m ( 4 lb·ft ) [ 0.6 kgf·m]
25/30 2006
Valve Lift a
3.0 mm ( 0.118 in ) or over
2
1
a
3
2
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