Lawnmower Troubleshooting: What To Do When Your Mower Won’t Start It’s frustrating when your lawnmower won’t start. Whether you’re attempting to cut the grass for the first time in the spring, or creeping into the late summer season, a mower breakdown can be a real time-waster. To help you get back to your lawn care tasks as soon as possible, here are some tips for troubleshooting your lawnmower.


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1. Check the Gas If your gas tank is empty, or if the gas contains too much water or ethanol, this could be the reason your mower isn’t starting. Fill up the tank with a fresh tank of gasoline and check to see if it works.

2. Look at the Sparks Plugs Your spark plugs might be clogged or soiled. Remove the spark plug, use a wire brush to clean it off and then replace it back in its original place. If the spark plugs are beyond repair, you can purchase a new set of spark plugs to replace them.

3. Empty the Carburetor Empty the carburetor’s fuel bowl and spray a carburetor cleaner into the carburetor’s throat using a spray cleaning can. If the carburetor needs more than a light spray, or is clogged up, have a lawnmower repair shop take a look.

4. Change Your Air Filter A dirty or clogged air filter could also be preventing your mower from starting properly.

Replace the air filter if you see it’s become soiled or worse. 5. Check the Oil Change out your lawnmower’s oil if it’s too old or it’s out of oil.

At the start of the season, always pour in a fresh tank of oil to help keep your mower running properly.

If you’ve tried the above tips and your mower still won’t start, take it to a lawn mower repair shop for a more thorough inspection.

I recently had my lawn mower serviced at Mobile Small Engine Repairs in Denver, CO and I was highly impressed with the quality of work!
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