Husqvarna ST131 Owners Manual - Page 16

Servicing the Spark Plug

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MAINTENANCE Servicing the Spark Plug Use a NGK BPR6ES, Champion RN9YC, or BOSCH WR6DC spark plug or equivalent. 1. Move snow thrower to a level surface. 2. Run snow thrower until all fuel has been depleted. 3. Wait until engine is cool. 4. Rotate the discharge chute so that it faces forward. 5. Remove the discharge chute and the discharge chute handle by removing the three carriage bolts and three flange nuts (Figure 25). 6. Remove two screws in plenum that hold top cover (Figure 26). 7. Remove the oil fill cap. 2 3 1 4 1 3 3 1. Screw 2. Plenum Figure 26 3. Oil fill cap 4. Top cover 2 2 Figure 25 1. Discharge chute 2. Carriage bolts 3. Flange nuts 8. Unsnap top cover by firmly pulling upwards at the rear section of the cover disengaging the three clips (Figure 27). 9. Shift top cover until fuel tank is clear of the rear upper cover and set top cover to the side of the unit. 10. Temporarily reinstall oil fill cap to prevent foreign object from entering the engine. 11. Remove 2 screws in the side cover and rear covers on both sides. 2 3 1 4 3 3 1. Top cover 2. Clips Figure 27 3. Screw 4. Rear upper cover 16

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16
MAINTENANCE
Servicing the Spark Plug
Use a NGK BPR6ES, Champion RN9YC, or BOSCH
WR6DC spark plug or equivalent.
1.
Move snow thrower to a level surface.
2.
Run snow thrower until all fuel has been depleted.
3.
Wait until engine is cool.
4.
Rotate the discharge chute so that it faces forward.
5.
Remove the discharge chute and
the discharge chute
handle by removing the three carriage bolts and three
flange nuts (Figure 25).
6.
Remove two screws in plenum that hold top cover
(Figure 26).
7.
Remove the oil fill cap.
1. Screw
3. Oil fill cap
2. Plenum
4. Top cover
1. Top cover
3. Screw
2. Clips
4. Rear upper cover
Figure 26
Figure 27
1
2
3
3
3
4
1
3
4
2
Figure 25
1. Discharge chute
3. Flange nuts
2. Carriage bolts
8.
Unsnap top cover by firmly pulling upwards at the
rear section of the cover disengaging the three clips
(Figure 27).
9.
Shift top cover until fuel tank is clear of the rear upper
cover and set top cover to the side of the unit.
10.
Temporarily reinstall oil fill cap to prevent foreign object
from entering the engine.
11.
Remove 2 screws in the side cover and rear covers
on both sides.
2
2
3
3
1