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Packaging: Includes one replacement spark plug and one air filter—two key wear-and-tear parts that require regular maintenance. There is no need to purchase parts separately; this convenient kit provides everything you need for basic engine maintenance. Compatibility: Compatible with Mountfield SP164 and SP185 petrol lawnmower models, covering a wide range of model years. Also suitable for related models such as the HP164, HP185, SP41, SP414, SP45, SP454 and SP46. Please ensure you check your machine’s model and year of manufacture before ordering to guarantee a perfect fit. Boost performance: A clean air filter prevents dust and grass clippings from entering the engine – a blocked filter reduces engine power and increases internal wear. A new spark plug ensures reliable ignition, helping your mower start easily and run smoothly, whilst preventing misfires. Convenience: Replacing these two components takes just a few minutes using basic tools. Locate the air filter cover, fit the new filter, then use a standard spark plug wrench to replace the spark plug. No specialist mechanical knowledge is required – ideal for owners who prefer to maintain their own garden equipment. Durability: Regularly replacing the air filter and spark plug at the start of each mowing season improves fuel efficiency, reduces strain on the engine and helps prevent costly breakdowns.