![]() ![]() This should always be the first stage of any lawnmower repair. To access the flywheel key you will first need to remove the spark plug. ![]() How To Access The Lawnmower Flywheel Key? You will need to remove the flywheel on the lawnmower first so let’s take a look at how to do that. It’s very simple to replace the flywheel key itself, however getting access to be able to remove it can be a little time consuming and frustrating if you don’t have the correct equipment. How Difficult Is It To Replace A Lawnmower Flywheel Key? To inspect it properly, however, it’s essential to remove the flywheel and inspect the whole part as even the slightest mark in the flywheel key can massively alter the timing and cause the lawnmower to kickback. It should look perfectly in line with the crankshaft. You can, however, remove the starter recoil and inspect the flywheel key from above. It is not visible fully until the flywheel itself is fully removed. The flywheel key is located underneath the flywheel. You can find lots more information and start repairing lawnmowers for profit by checking out my online training here Where Is The Flywheel Key? Chances are if you try to start the lawnmower with a sheared flywheel key you will experience kickback. If the flywheel key breaks or becomes sheared then your lawnmower will have poor timing or perhaps not start at all. It is there to prevent the crankshaft from becoming bent. Please subscribe to my youtube channel here The idea of a flywheel key is to save more expensive parts of the engine from being damaged, The flywheel key is designed to shear if the mower blade hits an object like a paving stone or tree stump hard enough to move the flywheel into an incorrect position with the crankshaft. Take a look at my video on how to replace a sheared flywheel key here ![]() This is what sets the timing on the lawnmower. The flywheel key is a small metal rectangular piece of metal that keeps the crankshaft and flywheel lined up when the flywheel is bolted to the engine. There is also a key at the bottom of the crankshaft where the blade adapter sits. You can find all parts required for repair in the recommended parts store here What Is A Lawn Mower Flywheel Key?Ī flywheel key is a little rectangular piece of metal that sits at the top of the crankshaft on your petrol lawnmower. This happens when the flywheel is in the incorrect position. It really doesn’t take much to slightly throw the timing off a lawnmower. If your lawnmower pull cord jerks back when you attempt to start up the lawnmower you can almost certainly be sure that at some point the blade has hit a hard object such as a tree stump or perhaps the edge of a paving stone. It can be eliminated by checking the crankshaft flywheel key and replacing it. In short, the engine fires at the incorrect time and causes the pull cord to jerk back in your hand. Most petrol lawnmowers kickback because the flywheel key in the lawnmower crankshaft has sheared causing the engine to be mistimed. Let’s take a look at how to eliminate kickback and some of the reasons it happens. The first of those is that the flywheel key has sheared, however, there are other reasons also. Usually, there is a simple reason your lawnmower tries to rip your arm off when attempting to start your lawnmower. In this article, I’m going to share some of the common reasons and repairs I have done over the years while repairing lawnmowers for profit. There are various reasons that lawnmowers kickback.
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