Checking Spark Plug

1. CAUTION: Touching hot surfaces can burn skin. The engine, components, and fluids will be hot if the engine has been running. Allow the engine to cool before servicing or working near the engine and components.

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

2. 
   MXAL47091-UN-16APR13

   Standard twin cylinder engine shown.

   Disconnect spark plug wire (A). For the twin cylinder engines, there is a spark plug on each side of engine.

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3. Remove each spark plug.

4. Clean spark plug carefully with a wire brush.

5. Inspect spark plug for:

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

6. NOTE: In Canada, replace spark plug with resistor plug only.

   Replace spark plug(s) as necessary.

7. 
   MXAL47092-UN-16APR13

   Check plug gap (C) with a wire feeler gauge. To change gap, move the outer electrode. Gap must be set to specification.

   Item	Measurement	Specification
   Spark Plug	Gap	0.75 mm (0.030 in.)

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8. Install spark plugs and tighten to specification.

   Item	Measurement	Specification
   Spark Plug	Torque	20 N·m (180 lb-in.)

9. Connect spark plug wire(s).