Check the information on the old plug to determine the proper replacement. Gas-powered lawn mowers work with a spark plug that ignites the engine. Depending on your brand and model, the spark plug may be located along the back of the engine or on the front, but is easy to identify by the wire clipped onto its tip.
How do I know what size Spark Plug I need?
The different types of spark plugs can seem overwhelming at first, but the simple way to find out what kind of spark plug you need is by checking your owner's manual. The manual will specify the right plugs for your vehicle.
What Spark Plug does a John Deere X300 take?
NGK BPR5ES
What kind of oil does a John Deere L100 use?
John Deere prefers that 10W-30 be used in all its gasoline-powered engines, including those on riding mowers. The "W" indicates that the oil was tested at low air temperatures.