Craftsman 107.289920 manual Clean Combustion Chamber, Spark Plug Gapping

REPLACE SPARK PLUG

Service Interval: Every 100 hours.

Replacement Spark Plug: 491055S

Spark Plug Gap: .030" (.76mm) (.°736°mm)

1.Stop the engine and allow it to cool.

2.Clean the area around the spark plug.

3.Remove the spark plug.

4.Check the spark plug gap. It should be .030" (.76

mm)(see Figure 35).

5.Reinstall the plug into the cylinder head. Tighten the

plug to 180 in-lbs (20 Nm). Figure 35. Spark Plug Gapping

CLEAN COMBUSTION CHAMBER

Service Interval: 100-400 hours

In order to maintain emission compliance, we recom- mend that after every 100-400 hours of operation that you have an authorized Briggs & Stratton or Sears Service Center remove combustion deposits from the cylinder, cylinder head, top of piston, and around the valves.

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