Bad mower spark plug

The air is warmer and the grass is growing — time to break out the lawn mower.

Thriving Yard is an affiliate for companies including Amazon Associates and earns a commission on qualifying purchases. Sometimes identifying if it actually is the spark plug that is the problem can be a challenge. Read on to see what makes a spark plug go bad, how to tell if yours has reached the end of its life, how to reinstall one, and when it needs replacing. Lawnmowers can have a variety of problems, and it can sometimes be difficult to diagnose which part is to blame. There are some key things to watch for that will let you know that the spark plug is the culprit. An overly worn or dirty spark plug will not spark as quickly and can take more work to get it functioning. Spark plugs may be inconsistent or unreliable if they are damaged or worn.

Bad mower spark plug

Due to carbon build-up and a weakened electrode, a small engine spark plug will degrade over time. Fortunately, the spark plug is one of the easiest engine components to replace. This step-by-step guide will teach you how to tell if a lawn mower spark plug is bad along with tips for testing other garden equipment. The ignition process relies on a suitable balance of fuel and air being drawn through the carburetor into the engine, a properly operating ignition coil , and a functioning spark plug. The flywheel has permanent magnets built into it, and as it moves past the ignition coil a magnetic field is created which induces electricity, allowing the ignition coil to send a high-voltage pulse to the spark plug. When the piston reaches the top of the cylinder, the spark plug ignites the compressed fuel and air mixture, forcing the piston back down. The spent fuel exits an exhaust port, fresh fuel enters the intake port, and the combustion process is repeated to keep the engine running. Repair Clinic stocks the appropriate spark plugs that fit the engines on all outdoor power equipment, including Craftsman , Honda , Toro , Echo , Poulan Pro , Ryobi , and Troy-bilt models. Plus get amazing DIY repair secrets! Claim Your Discount.

Installation Guides. Although they are demonstrating on a push mower, the symptoms and solutions are the same for a riding mower:.

The electrodes on a spark plug must be clean and sharp to produce the powerful spark required for ignition. The more worn or dirty spark plugs are, the greater the pull on the rewind and more effort is required to produce an adequate spark. These problems may also cause excessive fuel consumption, deposits on the cylinder head and oil dilution. Luckily, spark plugs are one of the easiest and most inexpensive engine components to replace. To check if your spark plug has gone bad you'll need to inspect your part for common signs suggestive that it might be fouled or damaged. Check out the steps below which outline how to determine why your spark plug is no longer working correctly.

Are you experiencing problems with your lawn mower? Our team has a wealth of experience in diagnosing and fixing such issues. We can guide you through the steps to identify and fix the problem, ensuring your lawn mower is back in action as soon as possible. A bad spark plug in a lawnmower causes hard starting, poor performance, stalling, misfiring, and increased fuel use. Check the gap, and clean or replace the plug.

Bad mower spark plug

From this guide, you will learn How to tell if a lawn mower spark plug is bad. This guide will quickly help you find and remove your spark plug and use five 5 simple steps to determine whether your lawn mower spark plug is bad. The most common way to tell if your lawnmower spark plug is failing is that the engine is more difficult to start. Your push mower engine may stutter and take several pulls to start.

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Unlike your car, your lawn mower and other lawn and garden equipment are not used regularly and the time spent sitting in storage can lead to problems with them running properly. Troubleshooting Lawn Mower Starting Problems. Typically, the consensus among the mechanical engineer community is that a spark plug for a lawn mower will last up to 25 hours of use. If you continue to try and start the equipment without success, you will flood the engine. Check the air filter The job of the air filter is to remove dirt and debris from the air before it enters your engine. Parts Lookup Tool. The filter may become clogged and not allow a sufficient amount of air into the engine for it to run smoothly. All spark plugs eventually wear out and need replacing. They are hardy and can withstand a lot of wear and tear. In many small engines, the gas cap also has a vent that serves as the fuel tank ventilation. Use the spark plug socket as needed and be sure not to overtighten the spark plug. See an authorized dealer if you are unsure of any procedure or have additional questions. Regular Maintenance. The spent fuel exits an exhaust port, fresh fuel enters the intake port, and the combustion process is repeated to keep the engine running.

Knowing how to test a spark plug on a lawn mower is something that can really come in handy. The best part is, once you know how to test one spark plug, you know how to test them all. The main signs that potentially indicate a bad lawn mower spark plug are:.

When you take your mower out for the first time, you may encounter a variety of situations. Repair Clinic stocks the appropriate spark plugs that fit the engines on all outdoor power equipment, including Craftsman , Honda , Toro , Echo , Poulan Pro , Ryobi , and Troy-bilt models. If the engine tries to turn over even for a second and dies, then you have spark. The filter may become clogged and not allow a sufficient amount of air into the engine for it to run smoothly. Paul Brown. See an authorized dealer if you are unsure of any procedure or have additional questions. They are not made to last through long term use. This includes replacing the spark plugs because they are cheap and easy to replace. Lawnmowers can have a variety of problems, and it can sometimes be difficult to diagnose which part is to blame. Remove one and look it over carefully. A larger gap decreases or weakens the spark output. Source: besthomegear. AmpliPHI 3. They are hardy and can withstand a lot of wear and tear. Clean off electrodes that look wet with carburetor cleaner and allow them to dry before replacing.