Every time you cut your grass with your lawn mower, it gets a little more dirty. Grass builds up under the mower deck, dirt and grime builds up around the engine, and the air filter becomes a little more dirty. Periodic maintenance of the lawn mower is essential to its long-term survival, and this includes periodic cleanings. Cleaning all the parts of your lawn mower ensures that it runs in top shape for many years. With a few tools and a little time, it is real easy to clean John Deere mowers.
Use car shampoo or similar soft detergent to clean the top of the lawn mower. Rinse the soap off with a garden hose. Be careful not to spray water sideways into the engine as this could get water into the air filter.
Disconnect the spark plug and lay the lawn mower on its side. Use a putty knife to scrape the old grass and debris from the underside of the mower. Use a stiff bristled brush with hot water to remove the rest of the debris. Rinse it with the garden hose.
Wipe down the engine with a wet soapy rag to remove any grime in the crevices. Doing this will prevent damage to the paint on the engine.
Replace the air filter if it hasn't already been replaced in the last two years.