Changing spark plugs is standard maintenance on gasoline-powered cars. Can you clean and reuse old spark plugs, or should you go for brand new ones?

Spark plugs that haven't been changed for a long time can become one with the cylinder head. Fortunately, it's possible to repair damaged threads instead of scrapping the head. (Photograph by Chris ...

Manufacturers have been doing their best to give gas-powered lawnmowers a run for their money with increasingly powerful and long-lasting cordless models. If you’re in the market for a new mower, ...