Here are some common reel mower maintenance issues and how to fix them: If it's running roughly or stalls frequently, the air filter may be dirty, check the spark plug. A dirty or faulty spark plug can prevent the mower from starting. If your mower is smoking like a chimney, check the oil level and add more if necessary. Or you can contect lawn mower maintenance service providers like Reel Rollers. They have everything you need to keep your mower right.