Snowmobile Yamaha FX10X, FX10RTX, FX10RTRX, FX10RTRAX, FX10MTX, FX10MTRX, FX10MTRAX. Manual - part 14

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HEADLIGHT BULB REPLACEMENT

ELECTRICAL

HEADLIGHT BULB REPLACEMENT

The following procedure applies to both of the
headlight bulbs.

1. Remove:

• Shroud

Refer to “COVERS” in CHAPTER 3.

2. Disconnect:

• Headlight coupler 1 

3. Remove:

• Headlight bulb cover 2 

4. Detach:

• Headlight bulb holder 3 

5. Remove:

• Headlight bulb 4 

6. Install:

• Headlight bulb
Secure the new headlight bulb with the head-
light bulb holder.

CAUTION:

Avoid touching the glass part of the headlight
bulb to keep it free from oil, otherwise the trans-
parency of the glass, the life of the bulb and the
luminous flux will be adversely affected. If the
headlight bulb gets soiled, thoroughly clean it
with a cloth moistened with alcohol or lacquer
thinner.

7. Attach:

• Headlight bulb holder

8. Install:

• Headlight bulb cover

9. Connect:

• Headlight coupler

10. Install:

• Shroud

Refer to “COVERS” in CHAPTER 3.

2

1

3

4

New

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HEADLIGHT BEAM ADJUSTMENT/BATTERY INSPECTION

HEADLIGHT BEAM ADJUSTMENT

1. Place the snowmobile on a level surface.

2. Place the snowmobile in front of a wall at the

recommended distance 

D. Refer to the table

below.

3. Measure the distance 

H from the floor to the

center of the headlight and place a mark on the
wall at that height.

4. With a person sitting on the snowmobile, apply

the parking brake, start the engine and let it idle.

5. Switch on the headlight high beam and check

the height of the projected beam on the wall.
The projection should be at the position marked
in step 3 or 1/2° lower (set range 

S).

D: Distance

H: Height

S: Set range

D 

3.0 m (10 ft)

7.6 m (25 ft)

S 

26 mm (1.0 in)

66 mm (2.6 in)

6. Adjust:

• Headlight beam (vertically)

Adjustment steps:

• Remove the shroud.

Refer to “COVERS” in CHAPTER 3.

• Turn the adjusting screw 1 in direction 

a or b

to adjust the headlight beams.

BATTERY INSPECTION

WARNING

Batteries generate explosive hydrogen gas and
contain electrolyte which is made of poisonous
and highly caustic sulfuric acid. Therefore,
always follow these preventive measures:
• Wear protective eye gear when handling or

working near batteries.

• Charge batteries in a well-ventilated area.
• Keep batteries away from fire, sparks or open

flames (e.g., welding equipment, lighted ciga-
rettes).

• DO NOT SMOKE when charging or handling

batteries.

• KEEP BATTERIES AND ELECTROLYTE OUT

OF REACH OF CHILDREN.

• Avoid bodily contact with electrolyte as it can

cause severe burns or permanent eye injury.

Direction 

a

Headlight beam is raised.

Direction 

b

Headlight beam is lowered.

1

b

a

a

b

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BATTERY INSPECTION

First aid in case of bodily contact:
External
• SKIN – Wash with water.
• EYES  – Flush with water for 15 minutes and

get immediate medical attention.

Internal
• Drink large quantities of water or milk fol-

lowed with milk of magnesia, beaten egg or
vegetable oil. Get immediate medical atten-
tion.

CAUTION:

• This is a sealed battery. Never remove the

sealing caps because the balance between
cells will not be maintained and battery per-
formance will deteriorate.

• Charging time, charging amperage and charg-

ing voltage for a MF battery are different from
those of conventional batteries. The MF bat-
tery should be charged as explained in the
charging method illustrations. If the battery is
overcharged, the electrolyte level will drop
considerably. Therefore, take special care
when charging the battery.

NOTE:

Since MF batteries are sealed, it is not possible to
check the charge state of the battery by measuring
the specific gravity of the electrolyte. Therefore, the
charge of the battery has to be checked by measur-
ing the voltage at the battery terminals.

1. Remove:

• Right side cover

Refer to “COVERS” in CHAPTER 3.

2. Disconnect:

• Battery leads

(from the battery terminals)

CAUTION:

First, disconnect the negative battery lead 1,
then the positive battery lead 2.

3. Remove:

• Battery bracket 3 

1

2

3

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BATTERY INSPECTION

4. Remove:

• Battery

5. Inspect:

• Battery charge

Inspection steps:

• Connect a pocket tester to the battery terminals.

NOTE:

• The charge state of a MF battery can be checked

by measuring its open-circuit voltage (i.e., the
voltage when the positive terminal is discon-
nected).

• No charging is necessary when the open-circuit

voltage equals or exceeds 12.8 V.

• Check the charge of the battery, as shown in

the charts and the following example.

Example

• Open-circuit voltage = 12.0 V
• Charging time = 6.5 hours
• Charge of the battery = 20 ~ 30%

È Open-circuit voltage (V)
É Charging time (hours)
Ê Relationship between the open-circuit voltage and

the charging time at 20 °C (68 °F)

Ë These values vary with the temperature, the condi-

tion of the battery plates, and the electrolyte level.

Ì Time (minutes)
Í Charging
ΠAmbient temperature 20 °C (68 °F)
Ï Check the open-circuit voltage.
РCharging condition of the battery (%)

Positive tester probe 

→ 

positive battery terminal

Negative tester probe 

→ 

negative battery terminal