Snow Engine Manual

ARIENS AX Snow Engine Manual 11

SPARK PLUG MAINTENANCE

F6RTC (Torch) Plug Recommended / F6RTP (Platinum) Optional

Cross References:

• Champion plug cross reference is: RN9YC (some tables show RN9YCC)

• NGK plug cross reference: BPR6ES

• BOSCH plug cross reference is: WR6DC

• NOTICE

Using an incorrect spark plug may cause engine damage.

Changing the Spark Plug

The heater box may be hot and must be allowed to cool completely before touching.

Mufﬂer and components inside heat shield may be HOT! Allow to cool before servicing the

spark plug or any area inside and around the heat shield.

1. When engine is cool, remove safety key switch.

2. Disconnect the spark plug cap and remove any debris from the spark plug area with high pressure air.

3. Remove the spark plug with a 13/16-inch spark plug wrench.

4. Inspect the spark plug. Replace it if the electrodes are worn or if the insulator is cracked or chipped. Spark plug gap should be set

to 0.027 - 0.030 inches.

5. Install the spark plug carefully to avoid cross threading. Screw in spark plug by hand until it stops turning.

6. Tighten the spark plug with a 13/16-inch spark plug wrench. Tighten 1/4 turn after the spark plug seats.

• NOTICE

A loose spark plug can overheat and damage the engine. Over-tightening the spark plug can damage the threads in the cylinder head.

7. Attach the spark plug cap. Ensure spark plug cap snaps into place securely.

8. Reinstall Safety Key Switch before attempting to start engine.

Servicing Your Engine CONTINUED

WARNING