To clean it first start with a cool engine. If your mower has a fuel valve switch it off. If you can disconnect the spark plug too. Next use a leaf blower to blast away any old dirt and major debris. Now gently lay the mower on its side fuel cap facing up. Try to get rid of any junk on the mowers underside as well.
Lawn mowers are tough. Like any machine though they need regular maintenance to run their best. Worse neglect can cause a mower to fail completely. So before the summer mowing season really kicks into high gear prep your mower right. From cleaning it to changing the oil to sharpening and balancing its blades this guide lays out steps to get your mower and your garden in tip-top shape.
Place a drip pan or other container on the side of the mower with the filler. Carefully tilt the mower so oil drains out and into the pan. Discard the spent oil into a proper disposal vessel. Now slowly pour fresh oil into the mower. For the specific type of oil you need check your instruction manual. Make sure to add only as much as your particular model requires. Remember to let the mower sit undisturbed for a few minutes so the oil settles properly inside the engine.