Yamaha FT50C - Checking the Thermostat; Checking the Cooling Water Passage

62Y5A11
3-8
1
2
3
4
5
6
7
8
9
Checking the thermostat
1. Remove the cover
1
, thermostat cover
2
, and thermostat
3
.
2. Suspend the thermostat in a container of
water.
3. Place a thermometer in the water and
slowly heat the water.
4. Check the thermostat valve opening at
the specified water temperatures.
Replace if out of specification.
5. Install the thermostat, new gasket, ther-
mostat cover, and cover.
Checking the cooling water passage
1. Check the cooling water inlet cover
1
and cooling water inlet for clogs. Clean if
necessary.
2. Place the lower unit in water, and then
start the engine.
S62Y3290
3
2
1
S62Y3300
Water
temperature
Valve lift
a
below
60 °C (140 °F)
0 mm (0 in)
above
70 °C (158 °F)
more than
3 mm (0.12 in)
S62Y3320
1
1
Power unit