How to Tune Up a Lawn Mower in Five Steps

Gas-powered lawn mowers, like any machine driven by an internal combustion engine, require maintenance over time to keep running smoothly. Here are the five things you should check to give your mower a tune up.

In this video from This Old House, Roger Cook shows us how to keep the mower running happily. If you’re familiar with engines, you’ve probably done most of this before—but personally, I need some guidance. First of all you should check the oil level (ideally before every use) and change it if it’s dirty. Then you should check the air filter, as a dirty, clogged filter will just make the engine work harder and less efficiently. Next up is the spark plug; Cook suggests you change it “every season” (i.e. a few times a year).

Of course, you should also check that the blade hasn’t dulled to much and sharpen it if necessary.

What I didn’t know is that old gasoline can go “stale” and you should only buy a small quantity (say a month’s worth) at a time. Otherwise the aging ethanol in the gas can damage the engine. You can add a fuel stabilizer to extend the life of the gas and prevent it from damaging the engine. Get those five items in check, then all you need is the lawn.

How to Tune Up Your Lawn Mower | This Old House

via Lifehacker
How to Tune Up a Lawn Mower in Five Steps