![]() This means less fuel available for the engine. If the spark plug is fault, a good portion of the fuel will not burn. Without this there will be no combustion. Remember that this component is needed to ignite the fuel. But the first place to check is the spark plug. Granted there are many reasons why a mower engine might refuse to run. In this section we will take a look at the most common symptoms and if it needs replacing. If your lawn mower refuses start or it stalls, the spark plug may need to be replaced. Does My Lawn Mower Need a New Spark Plug? If you are going to inspect the spark plug on your mower, it is a good idea to check the rest, including the bagger if it needs replacement. A hood covers the spark plug, a piece of plastic that conceals the main body and its terminal. The spark plug wire is about 1/4 inch (1 cm) thick and quite short. While the locations vary depending on the manufacturer, once you see one spark plug it is similar to the others. Spark plug wires are always visible as it is connected to the engine. Even with a hood, the spark plug is easy to identify. On the left is a worn out plug, on the right is brand new. This is what a lawn mower spark plug looks like. Even if you lift the engine cover, you have to know what a spark plug looks like. This is usually true for rider and lawn tractors. In others it can be challenging because it under the engine cover. Knowing what a spark plug looks like makes it easier to find it. If the manual does not say specifically where it is located, look for a short wire plugged into a cylinder. You will find the spark plug and its hood on the engine. Once you have figured that part, lift the cover. Next check if the engine is on the front or the rear. When searching for the spark plug on rider mowers and tractors, you have to lift the engine cover first. Regardless, when you do find the engine you will see the spark plug there. One thing to keep in mind about rider mowers and tractors is that the engine may be located in the front or back. The spark plug is connected to the wire and the cylinder. When you do find it, the configuration is similar to that on a walk behind mower. If you look at the table above, you will notice that many rider mowers have the spark plug at the sides. No matter what type of lawn mower you have, the spark plug will always be connected to the engine. One side is plugged into the engine cylinder and the other is connected to the wire. With few exceptions, most spark plugs on push lawn mowers are on either side of the engine. Note: the exact location of your lawn mower spark plug may differ. Keep in mind this are only a general guideline, as your mower design may have implanted a different setup. ![]() Here is a quick guide to where most lawn mower spark plugs are found. Look for a short, thick wire connected to a cylinder on the engine. ![]() You can also check the back or side of the engine. The assist way to find the spark plug is to consult your lawn mower user guide. The owner’s manual will specify its exact location. Some Craftsman mowers have the spark plug at the front of the engine, while on Toro models it is on the side. Spark plugs on push and rider lawn mowers are usually found on the back or side of the engine. You are in the right place as w will show where these plugs are found. Knowing where to find the spark plug on your mower is therefore a must. But where is it located exactly? Spark plugs get worn out or damaged, so you have to replace it eventually. The spark plug on your lawn mower produces the spark required to ignite the fuel mixture, so obviously it is important. As an Amazon Associate, this site earns commissions from qualifying purchases.
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