Toro Reelmaster 6500–D Service Manual page 56

Thermostat Test
If the engine overheats or runs too cool, and a faulty
thermostat is suspected, the thermostat should be
tested.
1. Remove the thermostat.
2. Put the thermostat in a container of water with a
thermometer and heat the water.
o
Starts to open at: 81 C (178
7 mm (0.28 in.) full open at 88
3. If the thermostat fails to open, only partially opens, or
sticks, it should be replaced.
Engine
o
F)
o o
C (190 F)
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Figure 37
Reelmaster 6500-D/6700-D