If you've ever tried mowing the lawn and found your mower wobbling like a suitcase with a broken wheel, you know something's up. Most people assume it's the engine acting up, but more often than not, ...

A close-up shot of a yellow lawn mower in an overgrown lawn. - KateV28/Shutterstock If you've ever pushed a lawn mower across a slightly damp patch of grass only to feel it skid like a shopping cart ...