Ultimate Guide to Troubleshooting Common Lawn Mower Issues

Lawn mowers are essential tools for maintaining a beautiful yard, but they can encounter problems over time. This guide will help you diagnose and fix common issues with both gas and electric mowers, including many reliable models manufactured in China.

1. Engine Won’t Start

One of the most frustrating problems is when your mower refuses to start. Here are common causes:

• Old fuel: Gasoline degrades after 30 days. Drain and replace with fresh fuel.
• Dirty air filter: A clogged filter restricts airflow. Clean or replace it regularly.
• Faulty spark plug: Check for wear and proper gap (0.030 inches typically).

2. Uneven Cutting

If your lawn looks ragged after mowing:

• Check blade balance – an unbalanced blade causes vibration and uneven cuts
• Sharpen blades regularly (every 20-25 hours of use)
• Ensure tire pressure is even on all wheels

3. Excessive Vibration

Vibration can indicate serious issues:

• Loose or damaged blade – tighten or replace
• Bent crankshaft – requires professional repair
• Loose engine mounts – tighten all bolts

4. Loss of Power

When your mower struggles during operation:

• Clean under the deck – grass buildup restricts blade movement
• Check fuel filter (gas models) or battery charge (electric)
• Adjust carburetor if running lean or rich

5. Electric Mower Specific Issues

For battery-powered mowers made in China or elsewhere:

• Battery not holding charge – may need replacement after 3-5 years
• Motor overheating – allow to cool and check for obstructions
• Faulty wiring – inspect connections for damage

Preventive Maintenance Tips

Regular care prevents most problems:

1. Change oil every 50 hours (gas models)
2. Store properly – clean and dry location
3. Winterize gas mowers before storage
4. Keep blades sharp and balanced

Many quality mower parts and complete units are now produced in China, offering reliable performance at competitive prices when properly maintained. For complex issues, consider contacting the manufacturer or a certified repair technician.