Snowmobile Yamaha Phazer PZ50W, PZ50GTW, PZ50FXW, PZ50MW, PZ50VTW, PZ50MPW. Manual - part 53

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ENG

OIL PAN AND OIL PUMP

REMOVAL

1. Remove:

• Oil pan

NOTE:

Loosen each bolt 1/4 of a turn at a time, in stages
and in a crisscross pattern. After all of the bolts are
fully loosened, remove them.

INSPECTION

1. Inspect:

• Oil pump housing
• Oil pump cover

Cracks/damage/wear 

→ Replace the defec-

tive part(s).

2. Measure:

• Inner-rotor-to-outer-rotor-tip clearance 

a 

(between inner rotor 1 and outer rotor 2)

• Outer-rotor-to-oil-pump-housing clearance 

b 

(between outer rotor 2 and pump housing 3)
Out of specifications 

→ Replace oil pump

assembly.

Inner-rotor-to-outer-rotor-tip clear-
ance:

Less than 0.12 mm (0.005 in)

Outer-rotor-to-oil-pump-housing 
clearance:

Oil pump outer rotor:

0.09 ~ 0.15 mm (0.004 ~ 0.006 in)

3. Inspect:

• Oil pump operation

Rough movement 

→ Repeat steps (1) and (2)

or replace the defective part(s).

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OIL PAN AND OIL PUMP

4. Inspect:

• Relief valve body 1 
• Relief valve 2 
• Spring 3 

Damage/wear 

→ Replace the defective 

part(s).

5. Inspect:

• Oil pump driven sprocket

Cracks/damage/wear 

→ Replace.

6. inspect:

• Oil pump drive chain

Damage/stiffness 

→ Replace the chain and

sprocket as a set.

7. Inspect:

• Check ball seat
• Check ball
• Spring
• Spacer

Damage/wear 

→ Replace the defective 

part(-s).

1

2

3

8. Inspect:

• Oil strainer 1 

Damage 

→ Replace.

Obstruction 

→ Wash and blow out with com-

pressed air.
Contaminants 

→ Clean with engine oil.

1

INSTALLATION

1. Lubricate:

• Inner rotor
• Outer rotor
• Oil pump shaft

(with the recommended lubricant)

2. Inspect:

• Oil pump operation

Unsmooth operation 

→ Replace.

Recommended lubricant:

Engine oil

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OIL PAN AND OIL PUMP

3. Install:

• Oil pump driven sprocket shaft 1 

NOTE:

Align the slit 

a on the oil pump driven sprocket

shaft with the projection 

b on the oil pump shaft.

4. Install:

• Dowel pins
• Gasket
• Oil pan
• Oil pan bolts

NOTE:

Tighten the oil pan bolts in stages and in a criss-
cross pattern.

T

 

R

.

.

Oil pan bolt:

10 Nm (1.0 m · kg, 7.2 ft · lb)

a

b

1

New

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BALANCER

BALANCER

Order

Job name/Part name

Q’ty

Remarks

Balancer shaft removal

Remove the parts in the order listed below.

Engine

Refer to “ENGINE ASSEMBLY”.

Cylinder head

Refer to “CYLINDER HEAD”.

A.C. magneto rotor/starter clutch gear

Refer to “A.C. MAGNETO ROTOR AND 
STARTER CLUTCH”.

1

Primary sheave drive shaft cover

1

2

Gasket

1

3

Primary sheave drive shaft assembly

1

4

Lock washer

2

5

Right balancer weight

1

6

Balancer shaft driven gear

1

7

Left balancer weight

1

8

Balancer shaft

1

9

Lock washer

1

10

Balancer shaft drive gear

1

4

5

8

16

7

6

15

4

13

14

2

1

(2)

(4)

(10)

3

17

18

19

10

9

11

12

É

É

Ê

Ë

È

Ê

New

LT

LT

12 Nm (1.2 m 

•

 kg, 8.7 ft 

•

 lb)

10 Nm (1.0 m 

•

 kg, 7.2 ft 

•

 lb)

75 Nm (7.5 m 

•

 kg, 54 ft 

•

 lb)

50 Nm (5.0 m 

•

 kg, 36 ft 

•

 lb)

È:   
É:   
Ê:   
Ë:   

New

New

New

New