Yamaha Waverunner 3 Manual

6-10
E
JET
PUMPJET THRUST NOZZLE AND NOZZLE RING
JET THRUST NOZZLE AND NOZZLE RING
EXPLODED DIAGRAM
REMOVAL AND INSTALLATION CHART
Step Procedure/Part name Q’ty Service points
JET THRUST NOZZLE AND 
NOZZLE RING REMOVALFollow the left “Step” for removal.
Jet pump unit Refer to “JET PUMP UNIT”.
Reverse gate Refer to “REVERSE GATE”.
1Bolt 2
2 Collar 2
3 Jet thrust nozzle 1
4Bolt 2
5 Washer 2
6 Collar 2
7 Nozzle ring 1
Reverse the removal steps for installation. 

6-11
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JET
PUMPIMPELLER DUCT AND IMPELLER HOUSING 1
IMPELLER DUCT AND IMPELLER HOUSING 1
EXPLODED DIAGRAM
REMOVAL AND INSTALLATION CHART
Step Procedure/Part name Q’ty Service points
IMPELLER DUCT AND IMPELLER 
HOUSING 1 REMOVALFollow the left “Step” for removal.
Nozzle ring Refer to “JET THRUST NOZZLE AND 
NOZZLE RING”.
1Bolt 4
2Nozzle 1
NOTE:
Clean the contacting surfaces before apply-
ing the Yamabond #4 (Yamaha bond num-
ber 4). 3Pin 2
4 Impeller duct assembly 1
5 Impeller housing 1 1
6Pin 2 

6-12
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JET
PUMPIMPELLER DUCT AND IMPELLER HOUSING 1
EXPLODED DIAGRAM
Step Procedure/Part name Q’ty Service points
7Bolt 4
8 Water inlet cover 1
9 Packing 1
10 Water inlet strainer 1
11 Packing 1
Reverse the removal steps for installation. 

6-13
E
JET
PUMPIMPELLER DUCT AND DRIVE SHAFT
IMPELLER DUCT AND DRIVE SHAFT
EXPLODED DIAGRAM
REMOVAL AND INSTALLATION CHART
*1: EPNOC grease AP #0 Step Procedure/Part name Q’ty Service points
IMPELLER DUCT AND DRIVE 
SHAFT DISASSEMBLYFollow the left “Step” for disassembly.
1 Impeller 1 Left-hand threads
2 Spacer 1
3Bolt 3
4Cap 1
5 O-ring 1
6Nut 1
7 Washer 1 

6-14
E
JET
PUMPIMPELLER DUCT AND DRIVE SHAFT
EXPLODED DIAGRAM
*1: EPNOC grease AP #0 Step Procedure/Part name Q’ty Service points
8 Drive shaft  1
9 Rear bearing  1
10 Spacer 1
11 Front bearing 1
12 Oil seal 1
13 Oil seal 1
14 Impeller duct 1
Reverse the disassembly steps for 
assembly.
Not reusable
Not reusable
Not reusable
Not reusable 

6-15
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JET
PUMPIMPELLER DUCT AND DRIVE SHAFT
SERVICE POINTS
Drive shaft removal
1. Remove:
Impeller 
NOTE:
The impeller has left-hand threads. Turn the
impeller clockwise to loosen it.
2. Remove:
Nut 1
 
Drive shaft holder:
YB-06151/90890-06519
Drive shaft holder:
YB-06151/90890-06519
3. Remove:
Drive shaft 1
 
NOTE:
Remove the drive shaft with a press.
4. Remove:
Rear bearing
ÈFor USA and Canada
ÉFor worldwide
Slide hammer set:
YB-06096
Stopper guide plate:
90890-06501
Bearing puller:
90890-06535...

6-16
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JET
PUMPIMPELLER DUCT AND DRIVE SHAFT
5. Remove:
Front bearing
NOTE:
Remove the front bearing with a press.
Drive rod:
YB-06071
Driver rod L3:
90890-06652
Needle bearing attachment:
YB-06112/90890-06614
6. Remove:
Oil seal
NOTE:
Remove the oil seals with press.
Impeller inspection
Refer to “JET PUMP UNIT” in 
Chapter 3.
Drive shaft inspection
1. Inspect:
Drive shaft
Damage/wear →
 Replace.
Drive rod:
YB-06071
Driver rod L3:
90890-06652
Needle bearing attachment:
YB-06196/90890-06653 

6-17
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JET
PUMPIMPELLER DUCT AND DRIVE SHAFT
Drive shaft installation
1. Install:
Oil seals
Driver rod:
YB-06071/90890-06606
Ball bearing attachment:
YB-06085/90890-06634
Distance 
a:
14.2 
± 0.2 mm (0.56 
± 0.01 in)
Distance 
b:
4.7 
± 0.2 mm (0.19 
± 0.01 in)
2. Install:
Front bearing 
Drive shaft
NOTE:
Install the front bearing and drive shaft with a
press.
3. Install:
Drive shaft (with front bearing)
Spacer
Impeller duct
NOTE:
Press the spacer and the front bearing with a
pipe that is more than...

6-18
E
JET
PUMPIMPELLER DUCT AND DRIVE SHAFT
5. Install:
Rear bearing 
NOTE:
Press the bearing inner/outer race at the
same time holding the drive shaft and impel-
ler duct.
If a bearing inner/outer race attachment is
not available, use a washer or pipe with an
outer diameter of 46 mm (1.81 in) and an
inner diameter of 20 mm (0.79 in).
Bearing inner/outer race 
attachment:
YB-34474
6. Add:
EPNOC grease AP #0 (into the cap)
Quantity:
Approximately 1/3 of capacity
7. Install:
Nut
Impeller 
Drive...

6-19
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JET
PUMPTRANSOM PLATE AND HOSES
TRANSOM PLATE AND HOSES
EXPLODED DIAGRAM
REMOVAL AND INSTALLATION CHART
Step Procedure/Part name Q’ty Service points
TRANSOM PLATE AND HOSES 
REMOVALFollow the left “Step” for removal.
Exhaust system Refer to “EXHAUST SYSTEM” in Chapter 8.
Jet pump unit assembly Refer to “JET PUMP UNIT”.
1 Hose clamp 2
2 Cooling water hose 1 Cooling water outlet (exhaust pipe)
3 Bilge hose 1 1
NOTE:
Route the bilge hose 1 under the drive shaft
tube.
4 Hose clamp 1
5 Cooling water...