Snowmobile Yamaha Phazer PZ50W, PZ50GTW, PZ50FXW, PZ50MW, PZ50VTW, PZ50MPW. Manual - part 51

5-41

ENG

A.C. MAGNETO ROTOR AND STARTER CLUTCH

A.C. MAGNETO ROTOR AND STARTER CLUTCH

i

Order

Job name/Part name

Q’ty

Remarks

A.C. magneto rotor and starter clutch 
removal

Remove the parts in the order listed below.

Engine assembly

Refer to “ENGINE ASSEMBLY”.

1

A.C. magneto cover

1

2

Gasket

1

3

Dowel pin

2

4

Pickup coil

1

5

Stator coil

1

6

A.C. magneto rotor

1

7

Idle gear shaft

1

8

Starter clutch idle gear

1

9

Starter clutch

1

10

Woodruff key

1

11

Starter clutch gear

1

12

Washer

1

For installation, reverse the removal proce-
dure.

LT

E

E

E

LT

LT

LT

LT

7

8

11

12

9

5

6

1

2

3

3

4

É

É

Ê

Ê

Ë

130 Nm (13.0 m 

•

 kg, 94 ft 

•

 lb)

12 Nm (1.2 m 

•

 kg, 8.7 ft 

•

 lb)

10 Nm (1.0 m 

•

 kg, 7.2 ft 

•

 lb)

7 Nm (0.7 m 

•

 kg, 5.1 ft 

•

 lb)

È:

É:

Ê:

Ë:

New

10

Ê

Ê

(3)

(5)

(7)

È

LT

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ENG

A.C. MAGNETO ROTOR AND STARTER CLUTCH

REMOVAL

1. Remove:

• A.C. magneto rotor bolt
• Washer

NOTE:

• While holding the A.C. magneto rotor 1 with the

sheave holder 2, loosen the magneto rotor bolt.

• Do not allow the sheave holder to touch the pro-

jection on the A.C. magneto rotor.

Sheave holder:

90890-01701, YS-01880-A

1

2

2. Remove:

• A.C. magneto rotor 1 

(with the rotor holding puller 2 and flywheel
puller attachment)

• Woodruff key

CAUTION:

To protect the end of the crankshaft, place an
appropriate sized socket between the rotor
holding puller set’s center bolt and the crank-
shaft.

NOTE:

Make sure the rotor holding puller is centered over
the A.C. magneto rotor.

Rotor holding puller:

90890-01362, YU-33270-B

Flywheel puller attachment:

90890-04089, YM-33282

2

1

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ENG

A.C. MAGNETO ROTOR AND STARTER CLUTCH

3. Remove:

• Starter clutch

NOTE:

• While holding the magneto rotor with the sheave

holder, remove the starter clutch bolts 1.

• Do not allow the sheave holder to touch the pro-

jection on the magneto rotor.

Sheave holder:

90890-01701, YS-01880-A

INSPECTION

1. Inspect:

• Stator coil
• Pickup coil

Damage 

→ Replace the pickup coil/stator

assembly.

2. Inspect:

• Starter clutch rollers 1 

Damage/wear 

→ Replace.

3. Inspect:

• Starter clutch idle gear
• Starter clutch gear 1 

Burrs/chips/roughness/wear 

→ Replace the

defective part(s).

• Starter clutch gear’s contacting surfaces 

a 

Damage/pitting/wear 

→ Replace the starter 

clutch gear.

1

a

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ENG

A.C. MAGNETO ROTOR AND STARTER CLUTCH

4. Inspect:

• Starter clutch operation

Installation steps:

• Install the starter clutch gear onto the starter

clutch and hold the starter clutch.

• When turning the starter clutch gear clockwise

È, the starter clutch and the starter clutch gear
should engage, otherwise the starter clutch is
faulty and must be replaced.

• When turning the starter clutch gear counter-

clockwise 

É, it should turn freely, otherwise the

starter clutch is faulty and must be replaced.

É

È

INSTALLATION

1. Install:

• Starter clutch

NOTE:

• While holding the magneto rotor with the sheave

holder, tighten the starter clutch bolt.

• Do not allow the sheave holder to touch the pro-

jection on the magneto rotor.

2. Tighten:

• Starter clutch bolts 1 

3. Install:

• Woodruff key
• A.C. magneto rotor
• Washer
• A.C. magneto rotor bolt

NOTE:

• Clean the tapered portion of the crankshaft and

the magneto rotor hub.

• When installing the magneto rotor, make sure the

woodruff key is properly seated in the key-way of
the crankshaft.

Sheave holder:

90890-01701, YS-01880-A

T

 

R

.

.

Starter clutch bolt:

12 Nm (1.2 m · kg, 8.7 ft · lb)
LOCTITE

®