McCulloch MC621, 96182000500 owner manual Servicing the Spark Plug

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, the discharge chute handle by removing the three carriage bolts and flange nuts (Figure 27).

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2

3

Figure 27

1. Discharge chute 2. Carriage bolts

3.Flange nuts

4.Remove the six screws that secure the shroud as- sembly (Figure 28).

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2

3

Figure 28

1.	Screw	3. Oil fill cap
2.	Shroud assembly

5. Remove the oil fill cap.

6. Remove the shroud assembly (Figure 28).

7. Install the oil fill cap.

8. Disconnect the spark plug wire from the spark plug (Figure 29).

9. Clean around the spark plug.

10. Remove the spark plug from the cylinder head.

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Figure 29

1. Spark plug wire

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 30).

0.030 inch

(0.76 mm)

Figure 30

12.Install the spark plug and torque it to 20–22 ft-lb (27–30 N-m).

13.Connect the spark plug wire to the spark plug (Figure 29).

14.Remove the oil fill cap.

15.Install the shroud with the screws removed in step 4 (Figure 28).

NOTE: Ensure that the shroud assembly fits together in the side grooves.

16.Install the oil fill cap.

17.Install the discharge chute, and the discharge chute handle onto the snowthrower using the hardware re- moved in step 3 (Figure 27).

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