Pre-summer mower check: How’s it holding up?

Check the basics before the blades spin

Before you fire up the mower for another round of summer cuts, take a few minutes to check its most critical components. A little attention now can go a long way in preventing stalls, sputters, or mid-mow breakdowns. It also helps extend the life of your machine. If you didn’t already tune up your mower at the start of spring, now’s a great time to catch up.

Need supplies? Stock up on mower maintenance parts like filters, spark plugs, and fuel treatments before summer lawn care season hits full swing.

Fuel freshness

Still running on last fall’s gas? That could be a problem. Gasoline degrades over time and can clog the carburetor or cause hard starting. If the fuel’s been sitting for more than a couple months, drain the tank and refill with fresh gas, ideally with a stabilizer to help it stay fresh in the summer heat.

Oil level and quality

Just like a car, your mower’s engine needs clean oil to stay in top shape. Check the dipstick before each mowing session and top it off if needed. If the oil looks dark, sludgy, or smells burned, go ahead and change it. It’s a quick job that makes a big difference in engine performance.

Air filter

A clogged or dirty air filter makes your mower work harder and run rough. Pop the filter cover open and inspect it. If it’s dark with debris or difficult to clean, it’s time for a replacement. Clean air means better combustion and less strain on the engine.

Spark plug

The spark plug is small but mighty. Remove it with a socket wrench and take a look. If it’s covered in carbon buildup, cracked, or the electrode is worn, replace the spark plug. A fresh spark plug makes starting easier and keeps the engine firing efficiently.

These basic checks are quick but powerful. Staying on top of lawn mower maintenance now helps avoid costly repairs later, and keeps your mower ready to handle whatever summer throws at it.

Inspect and sharpen the mower blade

If your mower blade hasn’t been touched since last season (or since ever) it’s time to give it a once-over. A sharp blade slices cleanly through grass, while a dull one rips and tears, leaving ragged brown tips that make even a healthy lawn look scruffy.

Not only does sharpening improve the look of your lawn, it also helps your mower run more efficiently. A clean cut puts less strain on the engine and helps promote healthier grass growth; two wins for your summer lawn care routine.

How to tell if your mower blade needs attention

If your lawn looks uneven after mowing, or you see torn, frayed grass blades instead of clean cuts, your blade is likely dull. You might also notice loud chopping sounds or the mower bogging down more than usual. While you’re at it, check the blade for visible damage. Nicks, bends, or cracks are all signs that it might be time to replace the blade altogether.

Safety first: Disconnect the spark plug

Before you inspect, sharpen, or remove the blade, always disconnect the spark plug wire to prevent accidental starts. It’s a simple step that keeps your fingers safe.

Sharpen or replace?

If the blade just looks dull, you can sharpen it at home with a file or grinder. Be sure to balance the blade before reinstalling. If it's deeply nicked, cracked, or worn down, skip the sharpening and grab a new blade.

Keeping your blade sharp is one of the easiest ways to get a better-looking lawn, and your mower will thank you for it.

Look over the wheels and deck

Even if your mower starts right up and cuts fine, a quick check of the wheels and deck can save you from annoying hiccups later in the season. These components take a beating, especially during heavy spring growth. A little TLC now can make summer mowing smoother.

Check the tires and height adjusters

Start with the wheels. Look for cracks in the tires, uneven wear, or broken treads that could affect traction. Then test the height adjusters on each wheel to make sure they move freely. If one side sticks or won’t stay in place, it could lead to an uneven cut or extra strain on the mower frame.

Clean the deck to improve airflow

Next, flip the mower on its side (spark plug wire disconnected, of course) and check underneath. Caked-on grass clippings can block airflow, reduce cutting efficiency, and even contribute to rust. Scrape off the buildup with a putty knife or stiff brush. For easier cleanup later, apply a light coating of non-stick deck spray to help prevent clippings from sticking in the first place.

Tighten loose bolts and check the frame

Give the whole mower a once-over for loose or rattling parts. Check bolts and nuts on the deck, handle, and wheels. A quick tighten here and there can prevent small problems from turning into major repairs mid-season.

Cleaning the deck and checking your hardware are both quick to do, and can go a long way toward keeping your mower running smooth and cutting clean.

Test the self-propel drive and handle controls

If your mower has a self-propel feature, now’s the time to make sure it’s still pulling its weight. After a few months of spring mowing (and maybe some rough terrain), the drive system and control cables can start to show signs of wear.

Make sure the wheels engage smoothly

Start the mower and test the self-propel function on a flat surface. It should move forward consistently when you squeeze the handle and stop cleanly when you release it. Jerky movement, slipping, or sluggish response could point to a worn drive belt or slipping wheels.

Inspect control cables

Check the cables running from the handles to the drive system and blade controls. Look for signs of fraying, cracking, or rust, especially where the cable housing connects to the mower frame. If cables stick or feel stiff, try applying a little lubricant or replace them if the damage looks more serious.

Confirm safe engagement and disengagement

Lastly, make sure the blade and drive controls engage and disengage without resistance. If the handle feels loose, doesn’t spring back, or takes extra effort to operate, something may be out of alignment. Smooth handle action isn’t just about comfort; it’s about control and safety while you mow.

A quick test before summer hits ensures you’re not fighting your mower every step of the way.

When to consider replacing parts (or the mower)

Even the most dependable mower can start showing its age. Some wear and tear is normal, but if things feel off no matter how much maintenance you do, it might be time to look at repairs, or even retirement.

Watch for these signs

• Belt trouble: If your self-propelled mower slips, stutters, or won’t move forward at all, a worn or stretched drive belt could be the issue. A new belt can restore smooth operation.

• Carburetor concerns: Difficulty starting, rough idling, or inconsistent power may point to a dirty or failing carburetor, especially if you’ve already changed the fuel and spark plug.

• Wheel wear: Wobbly, cracked, or bald wheels can make mowing feel more like wrestling. If height adjustments are stiff or uneven, the wheel assembly might need attention.

Know when it’s time to upgrade

If the cost of repairs adds up to more than the value of your mower, or if multiple parts are on their way out, it might be smarter to invest in a new machine. But don’t count your mower out too soon. Many problems have affordable solutions.

Before you throw in the towel, check Sears PartsDirect for the replacement parts you need to keep your mower running strong. Sometimes, a quick fix is all it takes to get another season (or several) out of your go-to grass cutter.

Keep your mower running strong all summer

You don’t need to overhaul your mower every weekend, but setting a simple monthly maintenance reminder can go a long way. Just a few minutes of upkeep each month helps prevent wear, avoids mid-mow breakdowns, and keeps your lawn looking its best.

Healthy, evenly cut grass doesn’t just look good. It also resists pests, weeds, and heat stress more effectively. And when your mower’s tuned up and ready, summer lawn care feels a whole lot less like a chore.

Need help staying on top of your maintenance routine? Our DIY lawn mower tune-up guide covers the essentials. Plus, many mower blades, belts, and tune-up parts on Sears PartsDirect are subscription eligible. You’ll get them delivered right when you need them, and shipping’s free with a subscription.

Summer’s just heating up. With a well-maintained mower, you’re ready for whatever the grass throws at you.