Yamaha F400A 2022 - Checking the Thermostat; Checking the Oil Cooler Cover Anode and Water Jacket Anode; Installing the Cylinder Block Thermostat; Installing the Water Jacket Cover

Oil cooler and water jacket
7-73
Checking the thermostat
1. Measure:
• Valve opening “a”
(at the specified water temperatures)
Out of specification → Replace.
TIP:
• Suspend the thermostat in a container of
water.
• Place a thermo meter in the water, and then
heat the water slowly.
Cylinder block thermostat
Oil cooler thermostat and water jacket
thermostat
Checking the oil cooler cover anode
and water jacket anode
1. Check:
•Anode
Eroded (1/2 or more worn out) → Replace.
Adhered grease, oil, or scales → Clean.
Do not apply grease, oil, or paint to the an-
odes.
Installing the cylinder block
thermostat
1. Install:
•Gaskets
• Cylinder block thermostats
• Thermostat housings
Installing the water jacket cover
1. Install:
• Water jacket anode
•Gasket
• Water jacket cover (lower)
TIP:
Tighten the water jacket cover (lower) bolts to
the specified torques in 2 stages.
2. Install:
•Hose “1”
•Clamp “2”
TIP:
Point the end of the clamp forward.
Water temperature Valve opening “a”
58–62 °C
(136–144 °F)
Starts opening
above 70 °C
(158 °F)
5.0 mm (0.20 in) or
above
Water temperature Valve opening “a”
58–62 °C
(136–144 °F)
Starts opening
above 70 °C
(158 °F)
3.0 mm (0.12 in) or
above
a
T
R
.
.
Water jacket anode screw
3.9 N·m (0.39 kgf·m, 2.9 lb·ft)
Water jacket cover (lower) bolt
1st: 6 N·m (0.6 kgf·m, 4.4 lb·ft)
2nd: 10 N·m (1.0 kgf·m, 7.4 lb·ft)
New
New