Bad mower spark plug

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 bad mower spark plug is the problem can be a challenge.

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.

Bad mower spark plug

The job of a spark plug is to ignite the fuel and air mixture that the carburetor sends to an engine cylinder. The energy created from this combustion process is what powers your equipment. If the spark is weak, this process cannot happen effectively. The most common symptom of a bad spark plug is that equipment is harder to start than normal. A mower with a pull cord may take several more pulls before the engine fires up. If your mower has a key start, it will simply fail to start. In this case, the spark created by the spark plug is too weak to ignite the fuel and air mixture in the cylinder. Each time you attempt to start the engine more fuel is pushed into the cylinder. The more fuel present, the harder the engine will be to start. If you continue to try and start the equipment without success, you will flood the engine.

These simple things may fix your power issues. Portable v.

The air is warmer and the grass is growing — time to break out the lawn mower. 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. When you take your mower out for the first time, you may encounter a variety of situations. If you are lucky, the lawn mower will start with the first pull of the cord. Unfortunately, after months of sitting around, it is likely your lawn mower may not run smoothly, or even start at all. Before you give up, here are some things you can do to troubleshoot the problem. The problem could be the age of the fuel in the tank, dirt or debris in the carburetor or an obstructed fuel tank vent.

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. Use the same type and gap. Remove the wire, unscrew the old plug, insert the new plug by hand, fully tighten it with a wrench, and reconnect the wire. Has your lawn mower been rugged to start or performing poorly? These could be signs of a bad spark plug. Our expert team has compiled a guide to help you identify and fix the problem.

Bad mower spark plug

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:. In order to give your spark plug a quick examination, you will need a couple of tools. Let me go through a very broad description of how to test a spark plug on a lawn mower before I dive into detail. The process of removing a lawn mower spark plug is pretty straightforward with the right tools. Pop the spark plug hood off, secure the ignition cable away from the plug, and get your socket set on it. To conduct a test for spark without a multimeter, I would recommend asking a friend or neighbor to lend a hand. The following steps will give you a good idea of why. First, reconnect the ignition cable to the spark plug once you have the plug removed.

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The filter may become clogged and not allow a sufficient amount of air into the engine for it to run smoothly. 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. Be sure to use the correct replacement spark plug designed for your lawn mower. Skip Navigation Home. PHI 3. Buy In Store. All rights reserved. Leave a Reply Cancel reply. Diagnostic Center. This is an excellent option for spark plugs that just have a little gasoline, oil, or carbon buildup on them but have the porcelain sheath intact and the electrodes still in good shape.

If you have spent any length of time using a gas-powered lawn mower, you may have come across the problem of a bad spark plug. A spark is needed for the internal combustion engine to run, and a spark plug is essential to the function of your lawn mower.

If the engine does not turn over at all, then there may be a problem with your ignition system. Check the amount, color and consistency of the oil. He knows exactly what the challenges are to nurturing a thriving yard in difficult soil. Find all Engine Safety Warnings. Weed Eater Smoking: Causes and Solutions. Owner Support. Gasoline will go bad in as few as 30 days, especially when fuel is mixed with ethanol as it is in many areas. In order to work properly and supply a sufficient amount of fuel to the carburetor, the vent must be open and free of any debris. About Us. All spark plugs eventually wear out and need replacing. Learn more about Champion parts , find your car part , or find where to buy your auto part today. Disconnect the plug lead, clean the area of the spark plug, and remove it with a spark plug socket.