Before the cold weather rolls in, it's easy to forget to remove unused gas from your lawn mower's engine. Here's why this oversight could be a major mistake.

Unfortunately, gasoline has a finite shelf life, becoming "old," within a matter of only a month in some cases. If the gas in your mower is stale, the machine will be difficult to start, won't run ...

Dumping out unused fuel comes with a host of safety issues, but properly disposing of old lawn mower gas can be surprisingly easy when you know where to go.

It is a bad idea to leave gas in a lawn mower over winter due to the internal problems it can cause. Do not mix old, stale gasoline from winter with new gas in spring. Dispose of the old gas first.