A genuine John Deere #M805853 Lawn Tractor Spark Plug. For 300, 400, GT, GX, Select, and EZtrak Series. Original equipment plugs can improve ease of starting, acceleration, fuel economy, and provide longer life. Original Equipment (OEM) part.
335, 425, 445
X320, X340, X360, X465, X500, X520, X534, X540
Z810A, Z820A, Z840A