Snowmobile Yamaha FX10X, FX10RTX, FX10RTRX, FX10RTRAX, FX10MTX, FX10MTRX, FX10MTRAX. Manual - part 66

6-8

COOL

WATER PUMP

Order

Job name/Part name

Q’ty

Remarks

Water pump disassembly

Remove the parts in the order listed below.

1 

Water pump housing cover

1

2 Gasket

1

3 Circlip

2

4 Impeller 

shaft 

gear

1

5 Pin

2

6 Impeller 

shaft 

assembly

1

7 

Water pump seal

1

8 Bearing

1

9 Oil 

seal

1

0 

Water pump housing

1

For assembly, reverse the disassembly pro-
cedure.

New

1

2

6

New

5

7

9

8

3

4

0

New

E

New

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WATER PUMP

REMOVAL

1. Remove:

• Timing mark accessing screw
• Crankshaft end cover

2. Align:

• “I” mark 

a on the AC magneto rotor

(with the stationary pointer 

b on the AC mag-

neto cover)

NOTE:

Turn the crankshaft clockwise.

3. Remove:

• Water pump assembly

a

b

DISASSEMBLY

1. Remove:

• Impeller
• Water pump seal 1 

NOTE:

Remove the water pump seal from the inside of the
water pump housing 2.

2. Remove:

• Bearing 1 
• Oil seal 2 

NOTE:

Remove the bearing and oil seal from the inside of
the water pump housing 3.

3. Remove:

• Rubber damper holder 1 
• Rubber damper 

2 

(from the impeller with a thin flat-head screw-
driver)

NOTE:

Do not scratch the impeller shaft.

1

2

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COOL

WATER PUMP

INSPECTION

1. Inspect:

• Water pump housing cover
• Water pump housing
• Impeller shaft

Cracks/damage/wear 

→ Replace.

2. Inspect:

• Bearing

Rough movement 

→ Replace.

ASSEMBLY

1. Install:

• Oil seal 1

(to the water pump housing)

NOTE:

• Before installing the oil seal, apply tap water or

coolant onto its outer surface.

• Install the oil seal with a socket that matches its

outside diameter.

2. Install:

• Bearing

NOTE:

Install the bearing with a socket that matches its
outside diameter.

3. Install:

• Water pump seal 1

CAUTION:

Never apply oil or grease onto the water pump
seal surface.

NOTE:

• Install the water pump seal 1 with the mechani-

cal seal installer 4 and middle driven shaft bear-
ing driver 5.

• Before installing the water pump seal, apply

Yamaha bond No.1215 (Three Bond No.1215

®

)

2 to the water pump housing 3.

È Push down

Mechanical seal installer:

90890-04145

Middle driven shaft bearing driver:

90890-04058

Bearing driver 40 mm:

YM-04058

Yamaha bond No. 1215:

90890-85505
(Three Bond No.1215

®

)

New

New

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WATER PUMP

4. Install:

• Rubber damper holder 1 
• Rubber damper 2 

NOTE:

Before installing the rubber damper, apply tap
water or coolant onto its outer surface.

5. Measure:

• Impeller shaft tilt

Out of specification 

→ Repeat steps (4) and

(5).

CAUTION:

Make sure the rubber damper and rubber
damper holder are flush with the impeller.

1 Straightedge
2 Impeller

Max. impeller shaft tilt:

0.15 mm (0.0059 in)

1

2

1

2

INSTALLATION

1. Align:

• “I” mark 

a on the AC magneto rotor

(with the stationary pointer 

b on the AC mag-

neto cover)

NOTE:

Turn the crankshaft clockwise.

2. Install:

• Water pump assembly

T

 

R

.

.

Water pump assembly bolt:

12 Nm (1.2 m · kg, 8.7 ft · lb)

a

b