Trouble getting your lawn mower to start up for the first big mow of the summer season? It may be due to a few issues, but this is the most likely cause.

Spark plugs for gas-powered lawn mowers aren't universal. They vary in size, gap, and heat range. The type you need depends ...

Other reasons your lawn mower might not start Tim Stocker Photography/Getty Images While a clog in the carburetor is usually the reason a mower will turn over but not start, it's not the only one.