Checking Spark Plug

1. Park machine safely. (See Parking Safely in the SAFETY section.)

2. Let engine cool.

3. Lift hood.

4. 
   GXAL42021-UN-04MAR13

   Twin cylinder engine shown

   Disconnect spark plug wire(s) (A), one on each side on V-twin engines.

---




5. Remove spark plug(s).

6. Clean spark plug carefully with a wire brush.

7. Inspect spark plug for:

   • Cracked porcelain.
   • Pitted or damaged electrodes.
   • Other wear or damage.
   
   

8. Replace spark plug as necessary.

9. 
   GXAL42022-UN-04MAR13

   Check plug gap (B) with a wire feeler gauge. To change gap, move the outer electrode.

   Gap must meet specifications.

   Item	Measurement	Specification
   Spark Plug	Gap	0.030 in. (0.76 mm)

---




10. Install and tighten spark plugs to specifications.

    Item	Measurement	Specification
    Spark Plug	Torque	15 lb-ft (20 N·m)

11. Connect spark plug wire(s) and lower hood.