Yamaha Waverunner 3 Manual

5-102
EPOWRTHERMOSTAT
THERMOSTAT
EXPLODED DIAGRAM
REMOVAL AND INSTALLATION CHART
Step Procedure/Part name Q’ty Service points
THERMOSTAT REMOVALFollow the left “Step” for removal.
1 Band 2
2 Clamp/cooling water hose 1/1ÈFor cooling water outlet on stern side.
3 Clamp/cooling water hose 2/1
NOTE:
Install the cooling water hose with the white
mark a facing up.
4 Clamp/cooling water hose 1/1ÉFor cooling water pilot outlet on starboard 
side.
5 Band/grease hose 1/1
6Bolt 2
7 Thermostat housing cover 1
3
1 3...

5-103
EPOWRTHERMOSTAT
EXPLODED DIAGRAM
REMOVAL AND INSTALLATION CHART
Step Procedure/Part name Q’ty Service points
8 Thermostat 1
9 Thermostat housing 1
Reverse the removal steps for installation.
3
1 3
9
8 74
6
5
12
LT
572
LT
572
6 × 35 mm
2nd   7.6 N • m (0.76 kgf 
• m, 5.5 ft 
• Ib) 1st    3.7 N • m (0.37 kgf 
• m, 2.7 ft 
• Ib)
ÈÉ a 

5-104
EPOWRTHERMOSTAT
SERVICE POINTS
Thermostat inspection
1. Check:
Thermostat 1 
Does not open at 50–60 °C (123–
141°F) → Replace.
1Thermostat
2Thermometer
3Water
4Container
ÈFully closed
ÉFully open
NOTE:
If the accuracy of the thermostat is in doubt,
replace it. A faulty thermostat could cause seri-
ous overheating or over cooling.Checking steps:
Suspend the thermostat in a container
filled with water.
Slowly heat the water.
Place a thermometer in the water.
While stirring the water, observe the...

5-105
EPOWRPRESSURE CONTROL VALVE
PRESSURE CONTROL VALVE
EXPLODED DIAGRAM
REMOVAL AND INSTALLATION CHART
Step Procedure/Part name Q’ty Service points
PRESSURE CONTROL VALVE 
REMOVALFollow the left “Step” for removal.
Exhaust manifold Refer to “EXHAUST MANIFOLD”.
1 Clamp/cooling water hose 1/1ÈFrom exhaust manifold
2 Clamp/cooling water hose 2/2ÉTo exhaust pipe
3 Clamp/cooling water hose 2/1
4 Clamp/cooling water hose 2/1
5 Joint 1
6 Clamp/cooling water hose 1/1ÊTo oil tank
7 Joint 1ËFrom cooling water...

5-106
EPOWRPRESSURE CONTROL VALVE
EXPLODED DIAGRAM
REMOVAL AND INSTALLATION CHART
Step Procedure/Part name Q’ty Service points
9Bolt 3
10 Pressure control valve assembly 1
11 Gasket 1
Reverse the removal steps for installation.
9
1
8 10 11
8
6
744
53 3
2 2
LT
572
LT
572
6 × 45 mm
2nd   7.6 N • m (0.76 kgf 
• m, 5.5 ft 
• Ib) 1st    3.7 N • m (0.37 kgf 
• m, 2.7 ft 
• Ib)
ÈÈÈÈ
É É
Ê
Ë Ì
Not reusable 

5-107
EPOWRPRESSURE CONTROL VALVE
EXPLODED DIAGRAM 
REMOVAL AND INSTALLATION CHART
Step Procedure/Part name Q’ty Service points
PRESSURE CONTROL VALVE 
DISASSEMBLYFollow the left “Step” for disassembly.
1Bolt 2
2 Collar 2
3 Pressure control valve housing 
cover1
4Spring 1
5 Pressure control valve 1
6Gasket 2
7Plate 1
LT
572
LT
572
1 2345
6 7
8 6 9
6 × 40 mm
2nd   7.6 N • m (0.76 kgf 
• m, 5.5 ft 
• Ib) 1st    3.7 N • m (0.37 kgf 
• m, 2.7 ft 
• Ib)
Not reusable 

5-108
EPOWRPRESSURE CONTROL VALVE
EXPLODED DIAGRAM 
Step Procedure/Part name Q’ty Service points
8 Grommet 1
9 Pressure control valve housing 1
Reverse the disassembly steps for 
assembly.
LT
572
LT
572
1 2345
6 7
8 6 9
6 × 40 mm
2nd   7.6 N • m (0.76 kgf 
• m, 5.5 ft 
• Ib) 1st    3.7 N • m (0.37 kgf 
• m, 2.7 ft 
• Ib) 

5-109
EPOWRPRESSURE CONTROL VALVE
SERVICE POINTS
Pressure control valve inspection
1. Check:
Pressure control valve 1 
Spring 2 
Damage/wear → Replace the defective
part(s).
2. Check:
Pressure control valve housing cover
Pressure control valve housing
Cracks/damage → Replace.
3. Check:
Cooling system
Leaks → Repair or replace any faulty
part. 

E
JET
PUMP
CHAPTER  6
JET PUMP UNIT
INTAKE GRATE, RIDE PLATE, AND INTAKE DUCT.................................... 6-1
EXPLODED DIAGRAM ............................................................................. 6-1
REMOVAL AND INSTALLATION CHART ................................................ 6-1
JET PUMP UNIT .............................................................................................. 6-3
EXPLODED DIAGRAM ................................................................................