A flywheel key is a small, metal piece that helps to keep the flywheel attached to the crankshaft. The key can shear for a number of reasons, including improper installation, an imbalanced flywheel, or excessive vibration. When the key shears, it can cause damage to the engine and may even prevent the engine from starting.
If you’ve ever wondered what causes a flywheel key to shear, wonder no more! In this blog post, we’ll take a look at the most common reason for this failure and how you can prevent it from happening.
The most common cause of flywheel key shearing is improper installation.
If the key is not installed correctly or if it’s not tight enough, it can come loose and shear under load. This is why it’s important to make sure that the key is properly seated and tightened before use. Another potential cause of flywheel key shearing is excessive vibration.
If the engine is not properly balanced or if there are other sources of vibration (such as an unbalanced drivetrain), this can put stress on the key and eventually cause it to fail. Again, proper installation and balancing are critical to preventing this type of failure. Finally, sometimes a flywheel key will simply break due to age or wear.
Over time, metal fatigues and weakens, so even if everything else is installed correctly, an old or worn-out key may eventually snap under load. Replacing your flywheel keys regularly can help avoid this type of failure. So there you have it – three potential causes of flywheel key shearing.
By being aware of these issues and taking steps to prevent them, you can help keep your engine running smoothly for years to come!
- Snapper Rear Engine Rider Part 4 – Flywheel Key Keeps Shearing
- Symptoms of Sheared Flywheel Key
- How to Fix a Sheared Flywheel Key
- How to Make a Flywheel Key
- How to Replace Flywheel Key on Briggs & Stratton
- How Do I Know If My Flywheel Key is Sheared?
- What is the Purpose of the Flywheel Key?
- How Do You Remove a Sheared Flywheel Key?
- How Does a Woodruff Key Work?
Snapper Rear Engine Rider Part 4 – Flywheel Key Keeps Shearing
Symptoms of Sheared Flywheel Key
If you’ve ever seen a car with a spinning wheel and no driver, you’ve seen a sheared flywheel key. The key is what keeps the flywheel attached to the crankshaft. If it breaks, the flywheel can come loose and spin on its own.
Sheared flywheel keys are not uncommon, and they can happen to anyone. The most likely cause is simply that the key has worn down over time and finally snapped. It’s also possible for the key to break if the engine is revved too high or if there’s some other type of misalignment between the flywheel and crankshaft.
If your car starts making strange noises or refuses to start at all, it’s possible that you have a sheared flywheel key. In some cases, you may be able to see that the key has broken in half when you look at the engine. But even if you can’t see anything, it’s still worth taking your car to a mechanic to have it checked out just in case.
How to Fix a Sheared Flywheel Key
If your lawn mower won’t start, the problem may be a sheared flywheel key. The flywheel key is a small metal piece that fits into a slot on the flywheel. The key keeps the blade from turning while the engine is running.
If the key breaks or shears, it can cause the blade to turn independently of the engine, which can damage the engine and make it difficult to restart. Fortunately, fixing a sheared flywheel key is a relatively easy repair that you can do yourself. Here’s what you’ll need to do:
1. Disconnect the spark plug wire from the spark plug so that the engine won’t start accidentally while you’re working on it. 2. Remove the air filter cover and set it aside. 3. Use a wrench to loosen and remove the nut that holds down the rubber recoil starter cup.
Be careful not to lose this nut! 4. Remove the recoil starter cup and set it aside with the air filter cover.
How to Make a Flywheel Key
A flywheel key is a small metal piece that sits in a groove on the flywheel. The purpose of the flywheel key is to keep the crankshaft from moving when the engine is running. If the flywheel key were to come loose, the crankshaft would be able to move and cause serious damage to the engine.
To replace a damaged or missing flywheel key, you will need to remove the old key from the groove. This can be done with a punch and hammer or by using a chisel. Once the old key is removed, you can install the new key in its place.
Be sure to tap it gently into place so that it is flush with the surface of the flywheel.
How to Replace Flywheel Key on Briggs & Stratton
If your Briggs & Stratton engine won’t start, the flywheel key may be damaged or missing. The flywheel key is what keeps the crankshaft and flywheel in alignment so the engine can run smoothly. Replacing the flywheel key is a simple repair that you can do yourself in minutes.
First, remove the spark plug and turn the engine over several times to release any pressure in the cylinders. Next, remove the blower housing and governor linkage from the top of the engine. Then, take off the flywheel shroud and unscrew the bolts that hold on the flywheel.
Be careful not to lose any of these parts as they are all necessary for reassembly. Once you have access to the crankshaft, use a wrench to loosen but not removethe crankshaft nut. This nut holds on the washer and retaining ring that keepthe flywheel attached tothe crankshaft.
Withthe nut loosened, you should now be ableto slide offthe oldflywheel keyandreplace itwith a new one. Make surethat everythingis tight beforereassemblingthe engineand starting it up again.
How Do I Know If My Flywheel Key is Sheared?
If you have a sheared flywheel key, it’s likely that your engine will not run smoothly. In fact, it may not run at all. The key is what keeps the flywheel attached to the crankshaft.
When it breaks, the flywheel can come loose and cause all sorts of damage to your engine.
– Your engine will misfire or run unevenly – You’ll hear strange noises coming from the engine area – The engine will vibrate more than usual
If you suspect that your flywheel key has sheared, the best thing to do is take your car to a mechanic and have them check it out. They’ll be able to tell for sure if the key is sheared and replace it if necessary.
What is the Purpose of the Flywheel Key?
A flywheel key is a thin piece of metal that fits into a keyway on the flywheel. The purpose of the flywheel key is to keep the crankshaft from moving on the shaft and to keep the flywheel from spinning on the shaft.
How Do You Remove a Sheared Flywheel Key?
If your flywheel key shears, it can cause serious damage to your engine. The key is what keeps the crankshaft and flywheel in alignment, so if it breaks or shears, the two parts can become misaligned and cause a lot of damage.
Fortunately, removing a sheared flywheel key is relatively simple.
You’ll need to remove the flywheel first, which will require unbolting it from the engine. Once the flywheel is off, you should be able to see the sheared key still in place. Using a chisel and hammer, carefully tap on the end of the key until it comes loose from its slot in the flywheel.
You may need to use a pry bar to help loosen it up. Once the key is out, you can install a new one by tapping it gently into place with a hammer. Be sure to line up the slots in both the flywheel and crankshaft before doing this so that everything stays properly aligned.
How Does a Woodruff Key Work?
A Woodruff key is a half-moon shaped piece of metal that fits into a groove on the shaft of a rotating machine. The purpose of the key is to keep the parts of the machine from moving relative to each other.
The most common use for a Woodruff key is in an internal combustion engine, where it keeps the crankshaft from moving relative to the flywheel.
The flywheel is attached to the crankshaft with bolts that go through holes in the flywheel and are tightened against nuts on the other side. If these bolts were not used, then as the engine rotated, centrifugal force would cause the flywheel to move away from the crankshaft. The Woodruff key prevents this by fitting into a semicircular groove in both the crankshaft and flywheel.
As long as there is no axial force trying to move the flywheel along the shaft, shear forces betweenthe keys and grooves will keep everything locked together nicely.
There are many possible causes for a flywheel key to shear, but the most common cause is improper installation. If the key is not installed correctly, it can become loose and eventually shear off. Other causes include excessive vibration, misalignment, and wear.