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Lawn Mower Repair 101: Common Problems & How to Fix Them

Posted by Power Tool Replacement Parts on Feb 13th 2025

Lawn mowers are essential for keeping your yard looking great, but like any machine, they need maintenance and occasional repairs. If you’re wondering how to fix your Briggs & Stratton lawn mower engine or troubleshoot common mower issues, this guide will help.

❑ Common Lawn Mower Problems & Fixes

Here are some frequent issues and quick solutions:

▴ Lawn Mower Won’t Start

  • Check the spark plug – Replace if it’s dirty or damaged.

  • Inspect the fuel system – Old gas or a clogged fuel filter can prevent starting.

  • Clean the carburetor – A dirty carb can block fuel flow.

▴ Engine Runs Rough or Stalls

  • Replace the air filter – A dirty filter restricts airflow.

  • Check for bad fuel – Drain old gas and use fresh fuel with a stabilizer.

▴ Blades Won’t Cut Properly

  • Sharpen or replace dull blades for a clean cut.

  • Check the deck height to ensure even mowing.

▴ Lawn Mower Smoke Types

  • White smoke? Too much oil or a tipped mower can cause this.

  • Black smoke? The engine may be running too rich—clean or replace the air filter.

❑ Fixing a Briggs & Stratton Engine

Briggs & Stratton engines are known for their durability, but common repairs include:

  • Changing the spark plug and air filter regularly.

  • Cleaning the carburetor if the engine won’t stay running.

  • Replacing the fuel filter to keep fuel flowing smoothly.

If you'd like a visual tutorial, this video walks you through three types of Briggs & Stratton mower maintenance that's necessary to keep your mower at top speed.

❑ Final Thoughts

Regular maintenance can prevent most lawn mower problems. Keep up with oil changes, clean the carburetor annually, and store your mower properly in winter to extend its life. If you're unsure about a repair, consult a professional or check out official parts and guides from trusted distributors.