How to Start a Lawn Mower: Complete Starting Guide

Having trouble starting your lawn mower? Learn the proper techniques for starting both push mowers and riding mowers, including troubleshooting common starting problems.

5-10 minutes
beginner
year-round

Tools You'll Need

  • Fresh fuel
  • Spark plug wrench
  • Clean rag
  • Safety gloves

Materials

  • Fresh gasoline
  • Spark plug (if needed)
  • Air filter (if needed)

Step-by-Step Instructions

1

Safety Check

Ensure the mower is on a flat, stable surface. Check that the spark plug wire is connected and the fuel tank has fresh gas.

Pro Tips

  • Never start mower indoors
  • Check oil level before starting
  • Ensure area is clear of debris
2

Prepare the Mower

For push mowers, set the throttle to 'start' position. For riding mowers, ensure the parking brake is engaged and the blade switch is off.

Pro Tips

  • Check throttle settings
  • Engage parking brake on riding mowers
  • Turn off blade engagement
3

Prime the Engine

Press the primer bulb 3-5 times to draw fuel into the carburetor. This is especially important for cold starts.

Pro Tips

  • Don't over-prime
  • Prime more in cold weather
  • Listen for fuel flowing
4

Pull the Starter Cord

Hold the starter handle firmly and pull with a smooth, steady motion. Don't yank the cord - use controlled pulls.

Pro Tips

  • Use smooth, steady pulls
  • Don't yank the cord
  • Let cord retract fully between pulls
5

Adjust and Run

Once started, let the engine warm up for 30-60 seconds. Adjust the throttle to the desired speed for mowing.

Pro Tips

  • Let engine warm up
  • Check for unusual sounds
  • Adjust throttle gradually

Frequently Asked Questions

Why won't my lawn mower start?

Common causes include old fuel, dirty spark plug, clogged air filter, or a disconnected spark plug wire.

How many times should I pull the starter cord?

Try 3-5 pulls. If it doesn't start, check fuel, spark plug, and air filter before continuing.

Should I use the choke when starting?

Use choke for cold starts, especially in cool weather. Don't use choke for warm starts.

How long should I let the mower warm up?

Let it run for 30-60 seconds before mowing to ensure proper lubrication and operation.

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