I'm Bill Elzey with Showplace Lawns. Let's talk a little bit about maintaining a power lawnmower. The first thing that you always want to do is safety and in doing so you want to take the plug wire off the spark plug to insure that the machine will not start. As you are working around underneath and things the last thing that you want is that machine to start and that blade to cut your hands. One of the key parts of the engine is the air filter. The engine does have to breath and it draws its air in through that filter. The filter since it breaths the dirty air does get clogged. This particular mower has screws to take the casing off of it. Some mowers just have snaps to release it and there is your air filter. On this particular mower the filter looks like this. Some filters for other machines will look like this one. There are variances. Be careful when you take your air filter off. Check it for dirty and then try to knock some of that dirt out of there but you don't want to damage some of the coils in the filter. Never use an air compressor hose to blow this off because you'll put a hole in it. Lightly tap it and put it back. At some point they will become too dirty and then just replace them. The other thing is the spark plug. Pull the plug and look at how dirty it is, clean it with a wire brush, wash it with a little bit of gasoline or a wet gasoline rag and stick it back in. Check your oil. Oil is very important. If you do not have enough oil you have no oil pressure and the machine may not run and it may not even start. Most mowers will take between 18 to 20 ounces depending on the engine size when you refill it. Do not overfill the oil capacity tank, then it will not start because of too much oil. Keep your blades sharp. I recommend after three to four cuttings, dress the edge of that blade up a little bit. Do these things through the course of the Summer and your mower should run just fine.