Servicing The Spark Plug - Poulan Pro PR121ES Owner's Manual

Servicing the Spark Plug

Use a NGK BPR6ES, Champion RN9YC, or BOSCH
WR6DC spark plug or equivalent.
1. Stop the engine and wait for all moving parts to stop.
2. Rotate the discharge chute so that it faces forward.
3. Remove the discharge chute and the discharge chute
handle by removing the three carriage bolts and three
fl ange nuts (Figure 26).
3
Figure 26
1. Discharge chute
3. Flange nuts
4. Remove the six screws that secure the shroud assembly
(Figure 27).
5. Remove the oil fi ll cap.
6. Remove the shroud assembly.
1
3
Figure 27
1. Screw
2. Shroud assembly
1
3
2
2
2. Carriage bolts
2
3. Oil fi ll cap
7. Install the oil fi ll cap.
8. Disconnect the spark plug wire from the spark plug
(Figure 28).
1
1. Spark plug wire
9. Clean around the spark plug.
10. Remove the spark plug from the cylinder head.
IMPORTANT: Replace a cracked, fouled, or dirty spark
plug. Do not clean the electrodes because grit entering
the cylinder can damage the engine.
11. Set the gap on the plug to 0.030 inch (0.76 mm)
(Figure 29).
12. Install the spark plug and torque to 20–22 ft-lb
(27-30 N-m).
13. Connect the spark plug wire to the spark plug
(Figure 28).
14. Remove the oil fi ll cap.
15. Install the shroud with the screws removed in step 4
(Figure 27).
NOTE: Ensure that the shroud assembly fi ts together in
the side grooves.
16. Install the oil fi ll cap.
17. Install the discharge chute, and the discharge chute
handle onto the snowthrower using the hardware re-
moved in step 3 (Figure 26).
14
Figure 28
0.030 inch
(0.76 mm)
Figure 29