How to Start a Lawn Mower That’s Been Sitting?

Spring has sprung, the sun is shining, and your lawn is calling out for a trim. But when you pull out your trusty lawnmower, you realize it’s been sitting idle all winter. Now you’re faced with the daunting task of bringing it back to life. Don’t worry, this article will walk you through the steps to successfully start a lawnmower that’s been collecting dust. We’ll cover everything from preparing the engine to troubleshooting common starting problems, equipping you with the knowledge and confidence to get your mower running smoothly in no time.

Overview

Getting a lawn mower started after a long period of inactivity can be a bit tricky, but with the right approach, it’s a manageable task. The key is to address potential issues that may have arisen during its time of dormancy. We’ll explore how to properly prepare the mower, check its fluids, and use the correct starting procedures. We’ll also delve into common problems and provide solutions to help you overcome them.

Preparing Your Lawn Mower for Startup

Before you even think about pulling the starting cord, you need to prepare your lawnmower for a successful start. This involves a few basic but essential steps:

1. Check the Fuel

a. Age Matters: Old gasoline can gum up the engine and prevent it from starting. If the fuel in your mower is more than 3 months old, it’s best to drain it.

b. Fresh Fuel is Best: Use fresh, high-quality gasoline with the appropriate octane rating as recommended by your mower’s manual.

c. Stabilizer is a Must: If you’re storing your mower for a long time, add fuel stabilizer to the gasoline to prevent it from deteriorating.

2. Clean the Air Filter

A dirty air filter can restrict airflow to the engine, making it difficult to start.

a. Remove and Inspect: Locate the air filter, remove it, and inspect it for dust, debris, or any blockage.

b. Clean or Replace: If it’s dirty, clean it with a brush or compressed air. If it’s heavily soiled or damaged, replace it with a new one.

3. Check the Spark Plug

The spark plug is responsible for igniting the air-fuel mixture. A fouled or worn-out spark plug can hinder starting.

a. Inspect and Clean: Remove the spark plug, inspect it for damage or carbon buildup, and clean it with a wire brush.

b. Gap Check: Use a spark plug gap tool to ensure the gap between the electrodes is correct. Refer to your mower’s manual for the recommended gap.

c. Replacement if Needed: If the spark plug is heavily damaged or worn out, replace it with a new one of the correct type and heat range.

4. Oil Level Check

The engine needs oil for lubrication, and low oil levels can cause damage.

a. Dip Stick Check: Locate the dipstick, wipe it clean, and insert it back into the engine.

b. Oil Level: Remove the dipstick and check the oil level. It should be within the “full” range on the dipstick.

c. Top Up if Necessary: If the oil level is low, add the appropriate type and viscosity of oil. Refer to your mower’s manual for the recommended oil.

Starting Your Lawn Mower

After you’ve taken care of the preparations, you’re ready to start your mower. Here’s how:

1. Prime the Engine

a. Locate the Primer Bulb: Most lawnmowers have a primer bulb, which helps to deliver fuel to the carburetor.

b. Prime the Engine: Press the primer bulb several times to fill the carburetor with fuel.

2. Choke the Engine

The choke restricts airflow to the engine, enriching the fuel-air mixture for easier starting.

a. Locate the Choke: The choke lever is typically located on the handlebar.

b. Choke the Engine: Move the choke lever to the “choke” or “on” position.

3. Start the Mower

a. Prepare to Pull: Make sure the mower is on a flat surface and engage the brake if equipped.

b. Pull the Starting Cord: Pull the starting cord slowly and firmly until you feel resistance. Then pull it quickly and forcefully to start the engine.

c. Don’t Overdo It: Avoid pulling the cord multiple times without allowing the engine to start. This can damage the starter rope.

4. Adjust the Choke

Once the engine starts, slowly move the choke lever to the “run” or “off” position. The engine should continue to run.

5. Warm Up the Engine

Allow the engine to warm up for a few minutes before you begin mowing.

Troubleshooting Starting Problems

If your lawnmower still won’t start, there are a few common issues you can troubleshoot:

1. Fuel Problems

a. Old Fuel: If you haven’t used the mower for a while, the fuel may be old and gummed up. Drain the old fuel and replace it with fresh gasoline.

b. Fuel Lines: Check the fuel lines for any cracks, leaks, or blockages. Replace any damaged lines.

c. Fuel Filter: The fuel filter can become clogged, preventing fuel flow to the engine. Replace the filter.

2. Air Problems

a. Dirty Air Filter: A dirty air filter can restrict airflow to the engine. Clean or replace the air filter.

b. Blocked Air Intake: Check the air intake for any debris or obstructions that might be blocking airflow.

3. Spark Problems

a. Faulty Spark Plug: A fouled or worn-out spark plug won’t ignite the fuel-air mixture. Clean or replace the spark plug.

b. Spark Plug Wires: Inspect the spark plug wires for any damage or cracks. Replace any damaged wires.

c. Ignition Coil: The ignition coil provides the electrical current to the spark plug. If the coil is faulty, it will prevent the spark plug from firing. Replace the ignition coil if necessary.

4. Engine Problems

a. Low Oil: Low oil levels can cause engine damage and prevent it from starting. Check the oil level and add oil if necessary.

b. Clogged Fuel Lines: The fuel lines can become clogged with debris or old fuel. Clean or replace the fuel lines.

c. Carburetor Problems: A dirty or faulty carburetor can prevent the engine from getting the correct air-fuel mixture. Clean the carburetor or take it to a professional for servicing.

Safety First

Before you attempt to start your lawnmower, always prioritize safety:

1. Read the Manual:

Always refer to your lawnmower’s manual for specific instructions and warnings regarding operation and maintenance.

2. Safety Gear:

Wear appropriate safety gear, including safety glasses, gloves, and sturdy footwear.

3. Clear the Area:

Clear the area around the mower of any debris or obstacles that could cause harm.

4. No Distractions:

Avoid distractions while operating the mower.

Get Your Mower Running Again

Starting a lawnmower that’s been sitting for a while can be a little challenging, but by following these steps and troubleshooting any problems, you’ll be back on track to a well-maintained lawn in no time. Remember to always prioritize safety and consult your mower’s manual for specific instructions. With a little patience and the right approach, you can bring your lawnmower back to life and enjoy a beautiful, manicured lawn.

FAQs

1. How often should I start my lawn mower if it’s not in use?

It’s a good idea to start your lawnmower at least once a month, even if you’re not using it. This helps keep the engine lubricated and prevents the fuel from going bad. If you’re storing your mower for an extended period, it’s best to drain the fuel tank and run the engine until it’s out of gas. You should also change the oil before storing the mower.

However, starting the mower once a month might not be enough for certain models. Check your lawnmower’s manual for specific maintenance recommendations.

2. What should I do if my lawnmower won’t start after sitting for a while?

First, check if there’s fuel in the tank and make sure the fuel lines are not clogged. If there’s fuel, check the spark plug for corrosion or damage. If necessary, clean or replace the spark plug. If the spark plug is good, check the air filter and clean it if it’s dirty.

Finally, if the engine still won’t start, try adding a bit of starting fluid to the carburetor. Be careful, as starting fluid is highly flammable. If your lawnmower still refuses to start after following these steps, you may need to take it to a mechanic for repair.

3. What kind of fuel should I use for my lawnmower?

Using the right fuel is important for your lawnmower’s longevity. Always use fresh, high-quality gasoline with a minimum octane rating of 87. Avoid using gas that’s older than 30 days, as it can cause gum and varnish buildup in the fuel system.

Also, never use fuel with ethanol. Ethanol can attract moisture and cause corrosion in the fuel system, leading to engine problems.

4. What should I do if my lawnmower has a flat battery?

If your lawnmower has a flat battery, you’ll need to jump-start it or replace the battery. To jump-start your mower, you’ll need another battery and jumper cables. Connect the positive (red) cable to the positive terminal on both batteries. Then, connect the negative (black) cable to the negative terminal on the good battery, and the other end to a metal ground on the lawnmower.

Once the connection is established, start the good battery and then try to start the lawnmower. If the battery is beyond repair, it’s best to replace it with a new one.

5. Is it necessary to use a fuel stabilizer for my lawnmower?

Fuel stabilizer is a helpful additive that prevents fuel from going bad. It helps keep the fuel fresh and prevents gum and varnish buildup in the fuel system. If you’re storing your lawnmower for a long period, it’s a good idea to add fuel stabilizer to the tank.

You can find fuel stabilizers at most hardware and automotive stores.

6. How can I clean my lawnmower’s air filter?

The air filter helps keep your lawnmower’s engine clean and running smoothly. It’s essential to clean the air filter regularly to prevent dirt and debris from getting into the engine. To clean the air filter, remove it from the mower and tap it against a hard surface to remove loose dirt.

You can also use compressed air to blow out any remaining dirt. If the air filter is heavily soiled, you may need to replace it with a new one.

7. What should I do if my lawnmower is smoking?

If your lawnmower is smoking, it could be a sign of a serious problem. Some common causes of smoking include worn engine parts, oil leaks, or a clogged air filter. If you see smoke coming from your lawnmower, it’s best to stop using it immediately and take it to a mechanic for inspection.

Ignoring the problem could lead to further damage and costly repairs.

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