Yamaha Waverunner 3 Manual

5-22
EPOWROIL TANK
SERVICE POINTS
Oil tank removal
1. Remove:
Oil tank
NOTE:
Loosen the oil tank bolts and nuts in the
sequence shown.
3
1
2
4
5 6 8
7
2. Remove:
Oil tank cover
Gasket
NOTE:
Loosen the oil tank cover bolts in the sequence
shown.
1
2
6
734 8 5
3. Remove:
Oil breather plate 1 
Oil breather plate 2 
Gasket
NOTE:
Loosen the oil breather plate bolts in the
sequence shown.
4
6 510
9
82
1 3
7 

5-23
EPOWROIL TANK
4. Remove:
Oil cooler covers
Gaskets
NOTE:
Loosen the oil cooler cover bolts in the
sequence shown.8
19
12
7
6
5
11 10 3
4 2
Oil strainer inspection
1. Check:
Oil strainer 1
 
Damage →
 Replace.
Contaminants →
 Clean with engine oil.
Oil tank installation
1. Install:
Oil cooler covers
Gaskets
NOTE:
Tighten the oil cooler bolts in the sequence
shown.
T R..
Oil cooler cover bolt:
1st:
3.7 N  m 
(0.37 kgf  m, 2.7 ft  lb)
2nd:
7.6 N  m 
(0.76 kgf  m, 5.5 ft  lb)
5
124
1
6
7
8
2...

5-24
EPOWR
2. Install:
Gasket
Oil breather plate 2
Oil breather plate 1
NOTE:
Tighten the oil breather plate bolts in the
sequence shown.
T R..
Oil breather plate bolt:
1st:
1.9 N  m 
(0.19 kgf  m, 1.4 ft  lb)
2nd:
4.4 N  m 
(0.44 kgf  m, 3.2 ft  lb)
7
5 6
10 2
39 18
4
3. Install:
Gasket
Oil tank cover
NOTE:
Tighten the oil tank cover bolts in the
sequence shown.
T R..
Oil tank cover bolt:
1st:
3.7 N  m 
(0.37 kgf  m, 2.7 ft  lb)
2nd:
7.6 N  m 
(0.76 kgf  m, 5.5 ft  lb)
8
7
3
265 1 4
OIL...

5-25
EPOWROIL TANK
4. Install:
Oil tank
NOTE:
Tighten the oil tank nuts and bolts in the
sequence shown.
T R..
Bolt 
1:
1st:
15 N  m (1.5 kgf  m, 11 ft  lb)
2nd:
28 N  m (2.8 kgf  m, 20 ft  lb)
Nut 
2, bolt 
3:
1st:
2.0 N  m 
(0.20 kgf  m, 1.4 ft  lb)
2nd:
15 N  m (1.5 kgf  m, 11 ft  lb)
3rd:
39 N  m (3.9 kgf  m, 28 ft  lb)
6
8
7
5
4 3 1
2
3
2 2
1 

5-26
EPOWROIL PUMP
OIL PUMP
EXPLODED DIAGRAM 
REMOVAL AND INSTALLATION CHART
Step Procedure/Part name Q’ty Service points
OIL PUMP ASSEMBLY 
REMOVALFollow the left “Step” for removal.
Oil tank Refer to “OIL TANK”.
1 Clamp/breather hose 1/1
2 Drain plug/washer 1/1 Drain engine oil.
3Bolt 8
4Bolt 4
5 Oil pump assembly 1
6Gasket 1
7Pin 2
8 Strainer 1
Reverse the removal steps for installation.
8 654 3
7
7
LT
572
LT
LT
572
LT
18 N •
 m (1.8 kgf • m, 13 ft • Ib)
8 × 12 mm
6 × 25 mm
2nd   10 N • m (0.1 kgf 
•...

5-27
EPOWROIL PUMP
SERVICE POINTS
Oil pump removal
1. Remove:
• Oil pump assembly
NOTE:
Loosen the oil pump bolts in the sequence
shown.5
67
8 9
11
1 12
3
10
42
Oil pump inspection
1. Check:
Oil pump operation
Rough movement → Replace the defec-
tive part(s).
Oil strainer inspection
1. Check:
Oil strainer 1 
Damage → Replace.
Contaminants → Clean with engine oil. 

5-28
EPOWROIL PUMP
Oil pump installation
1. Install:
Oil pump assembly
NOTE:
Align the projection a on the oil pump
assembly with the slit b on the oil pump
driven gear shaft.
Tighten the oil pump bolts in the sequence
shown.
T R..
Oil pump assembly bolt:
1st:
1.4 N • m 
(0.14 kgf  m, 1.0 ft  lb)
2nd:
10 N  m (1.0 kgf  m, 7.2 ft  lb)
a
b
8
76
5 4
2
12 1
10
3
911 

5-29
EPOWRREDUCTION DRIVE GEAR
REDUCTION DRIVE GEAR
EXPLODED DIAGRAM
REMOVAL AND INSTALLATION CHART
Step Procedure/Part name Q’ty Service points
REDUCTION DRIVE GEAR 
REMOVALFollow the left “Step” for removal.
Generator cover Refer to “GENERATOR AND STARTER 
MOTOR”.
Oil pump Refer to “OIL PUMP”.
1 Drive coupling 1
2Bolt 1
3Bolt 1
4Bolt 1
5Bolt 2
6Bolt 4
9
9 10
12
11
12
10 8
2
4
3
6
5
16
57
E
LT
572
LT
LT
572
LT
LT
572
LT
LT
572
LT
LT
572
LT
8 × 100 mm
2nd   28 N • m (2.8 kgf 
 m, 20 ft 
 Ib) 1st    15...

5-30
EPOWRREDUCTION DRIVE GEAR
EXPLODED DIAGRAM
Step Procedure/Part name Q’ty Service points
7 Reduction drive gear case 1
8Gasket 1
9Pin 2
10 Circlip 2
11 Reduction drive gear 1
12 Washer 2
Reverse the removal steps for installation.
9
9 10
12
11
12
10 8
2
4
3
6
5
16
57
E
LT
572
LT
LT
572
LT
LT
572
LT
LT
572
LT
LT
572
LT
8 × 100 mm
2nd   28 N  m (2.8 kgf 
 m, 20 ft 
 Ib) 1st    15 N  m (1.5 kgf 
 m, 11 ft 
 Ib)
6 × 55 mm
2nd   7.6 N  m (0.76 kgf 
 m, 5.5 ft 
 Ib) 1st    3.7 N  m (0.37 kgf 
...

5-31
EPOWRREDUCTION DRIVE GEAR
EXPLODED DIAGRAM 
REMOVAL AND INSTALLATION CHART
*1: EPNOC grease AP #0 Step Procedure/Part name Q’ty Service points
REDUCTION DRIVE GEAR 
DISASSEMBLYFollow the left “Step” for disassembly.
1 Oil pump driven gear 1
2Bolt 1
3 Holder 1
4Spring 1
5 Relief valve 1
6Bolt 4
7 Bearing housing 1
8Pin 2
E
EE
E
E
15
13
14
16
18
17
12
9
11
10
11
9
8
7
61
2
34521
20
19
E
E
E
*1
AA
*1
5 × 10 mm
10 N 
 m (1.0 kgf  m, 7.2 ft  Ib)
6 × 16 mm8 × 40 mm
2nd   28 N  m (2.8 kgf 
 m, 20 ft...