Yamaha Waverunner 3 Manual

7-38
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–+ELECSTARTER MOTOR
SERVICE POINTS
Armature inspection
1. Inspect:
Armature shaft 1
 
Damage/wear →
 Replace.
1
2. Inspect:
Commutator
Dirt →
 Clean with 600 grit sandpaper.
3. Measure:
Commutator diameter
Out of specification →
 Replace.
Min. commutator diameter:
27.0 mm (1.06 in)
4. Check:
Commutator undercut
Contaminants →
 Clean.
NOTE:
Remove all mica and metal particles with com-
pressed air.
5. Measure:
Commutator undercut
Out of specification →
 Replace.
Min. commutator undercut:
0.2...

7-39
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–+ELECSTARTER MOTOR
6. Inspect:
Armature coil continuity
Out of specification →
 Replace.
Armature coil continuity:
Commutator segments 
1 Continuity
Segment - Laminations 
2 No continuity
Segment - Armature shaft No continuity
Brush holder inspection
1. Measure:
Brush length a
 
Out of specification →
 Replace.
Min. brush length:
6.5 mm (0.26 in)
2. Check:
Brush holder continuity
Out of specification →
 Replace.
Brush holder continuity:
Brush holder - Base  No continuity
Starter motor front...

7-40
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–+ELECCHARGING SYSTEM
CHARGING SYSTEM
WIRING DIAGRAM
B
RR
1
2
3
R
R
R
GGG
GGG
B
G
B
G
GGG
G
4
1Rectifier/regulator
2Fuse (20A)
3Battery
4Lighting coilB: Black
G : Green
R: Red 

7-41
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–+ELECCHARGING SYSTEM
FUSE
Refer to “STARTING SYSTEM”.
BATTERY
Refer to “ELECTRICAL” in Chapter 3.
LIGHTING COIL
Refer to “IGNITION SYSTEM”.
RECTIFIER/REGULATOR
Refer to “IGNITION SYSTEM”. 

7-42
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–+ELECELECTRIC BILGE PUMP
ELECTRIC BILGE PUMP
WIRING DIAGRAM
4321
8765
7 18 
L/RBrL
Y
R/YR/Y
R/Y
R/Y
R
Y
Br
Br
Br
BBB
B
B
B
RR
3 2 1
4 5
R
P
P
O R
B
R 
R 
R 1 2  3  4 5 6   7  8 
B
BB
R/Y R/YB Br
R/Y
R/Y
R/Y
R/YR/Y
R/Y
1ECM
2Main and fuel pump relay
3Fuse (3A)
4Battery
5Electric bilge pumpB: Black
Br : Brown
R: Red
Y : Yellow
R/Y : Red/yellow 

7-43
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–+ELECELECTRIC BILGE PUMP
ELECTRIC BILGE PUMP
1. Check:
Electric bilge pump operation
Incorrect →
 Replace.
Checking steps:
Suspend the electric bilge pump in a con-
tainer filled with water.
Connect the brown lead terminal to the
positive battery terminal.
Connect the black lead terminal to the
negative battery terminal.
Check the water flows from the electric
bilge pump hose.
–+
B Br 

7-44
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–+ELECINDICATION SYSTEM
INDICATION SYSTEM
WIRING DIAGRAM
G
G
R 
4 3
R 
Br 
Br 
L/RBrL
Y
R/YR/Y
R B
PR
O
R/Y
R/Y R/Y
R
P
W/B R/Y
B/O
R/YR/YR/Y
R/Y
YR R P P P1 2  3     5 6  
2 1
B
BB
7 6
8 5B/O
B/G
P
BP
B/O
PB
B/O
P
P
B
B
W
B
P
B/O
PB
B/Y
B/OB/YB/Y B/Y
B/O
B/Y9
B/O
B/OB/O
B/O
B/O
B/O
B/OB/O
B/O
B/O
R/W
B/YR/Y
L/BL/R
BB R
P
BB/YB/G
A B C
BR
W
0
L/BL/R
B/YR/YY
B/YR/WY
BRY
B
B
BB
R
71421123
P/W
P/W
P/W
D
B/OR/YW/B
4321
8765
1ECM
2Main and fuel pump 
relay
3Fuse (20A)
4Fuse (3A)
5Battery
6Tacho pulse...

7-45
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–+ELECINDICATION SYSTEM
FUSE
Refer to “STARTING SYSTEM”.
BATTERY
Refer to “ELECTRICAL” in Chapter 3.
LIGHTING COIL
Refer to “IGNITION SYSTEM”.
RECTIFIER/REGULATOR
Refer to “IGNITION SYSTEM”.
ECM
Refer to “IGNITION SYSTEM”.
ENGINE TEMPERATURE SENSOR
Refer to “IGNITION SYSTEM”.
THERMOSWITCH (ENGINE)
Refer to “IGNITION SYSTEM”.
THERMOSWITCH (EXHAUST)
Refer to “IGNITION SYSTEM”.
BUZZER
1. Check:
Buzzer
Buzzer does not sound →
 Replace.
Checking steps:
Connect the battery (12 V) to the buzzer
coupler...

7-46
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–+ELECINDICATION SYSTEM
OIL PRESSURE SWITCH
1. Measure: 
Oil pressure switch continuity
Out of specification →
 Replace.
Vacuum/pressure pump gauge 
set:
YB-35956-A/90890-06756
Oil pressure switch continuity 
pressure:
128 kPa (1.28 kgf/cm
2, 18.2 psi) –
166 kPa (1.66 kgf/cm2, 23.6 psi)
MULTIFUNCTION METER
Multifunction meter
1. Check:
Multifunction meter
Cracked meter housing →
 Replace the
multifunction meter.
Meter is fogged/shows signs of water
intrusion →
 Replace the multifunction
meter....

7-47
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–+ELECINDICATION SYSTEM
Display function
1. Check:
Display function
Not operate →
 Replace the multifunc-
tion meter.
L/BL/BB
L/R
B/YB/YR/W
B/GB
R/W
YY
RR
WW
B
B
B
B/G L/R
R
BR1
2
3
4
1Buzzer
2Speed sensor
3ECM
4Fuel senderB: Black
R: Red
W: White
Y : Yellow
B/G : Black/green
B/Y : Black/yellow
L/B : Blue/black
L/R : Blue/red
R/W : Red/white