The head gasket is one of the most critical parts of your lawnmower. It won't work correctly or with its full power if it blows. So, what can be the causes of a blown head gasket on a lawn mower? We've done some research, and here's what we've found.
Your lawnmower's head gasket can blow due to several reasons. These significant reasons are:
- Bad gas
- Low oil
- Wrong or advanced combustion/ignition timing
- Improperly placed head gasket
- Wear and tear
- Engine Knock
Now that you know why a lawn mower head gasket blows, let's also talk about lawnmowers. We've included the signs and results of a blown head gasket and how you can replace it. You can also find several tools and materials for lawnmower maintenance and care.
Why Lawn Mower Head Gasket Blows?
Like an automobile, a lawnmower also has a head gasket which is vital in locking the machine's combustion chamber to retain the motor's power. It's essential to check the condition of the head gasket so the lawnmower will perform at its fullest. Although sometimes, things happen, such as a blown head gasket. There are several reasons why this happens, and these are:
Your lawnmower can overheat because of low coolant, low engine oil, and clogged air cleaners. These can damage and result in a blown head gasket.
Harmful gas can cause engine damage or a blown head gasket. Bad gas is referred to as dangerous fuel that won't ignite accurately.
Your lawnmower's oil plays a significant role in keeping an excellent engine. If you don't check the oil and it's low, the engine will run hotter and can cause a blown head gasket.
Wrong or Advanced Combustion/Ignition Timing
If you have a wrong or super advanced combustion timing, it can cause the fuel-air combination to kindle prematurely. An incorrect ignition timing can cause a hefty dose of heat and, yes, can blow the head gasket.
Improperly Placed Head Gasket
An improperly installed head gasket won't secure a compact seal between the cylinder head and the engine block. It can lead to a blown head gasket or similar symptoms.
Wear And Tear And Low-Quality Parts
Wear and tear and using low-quality parts are other causes of a blown head gasket. You can avoid these by buying a high-quality or branded lawnmower. You can also avoid it by practicing good maintenance.
An engine knock happens because of several reasons, such:
- Engine oil that's below the level
- The rotor touches the carbon residues in the ignition chamber
- Oil with a stability measurement that's too insufficient for your engine
Check for these causes to avoid engine knocking, and prevent your lawnmower's head gasket from blowing.
What Are The Indicators Of A Blown Lawn Mower Head Gasket?
If your lawnmower encounters a blown head gasket, you may detect these signs:
- Inadequate power and pressure
- Unsuccessful condensation test
- Reduced contraction
- Fuel spreading and leaking
- A cloud of white or bluish smoke comes out from the tailpipe
How To Check For A Blown Lawn Mower Head Gasket
You can follow these simple steps in checking for a blown head gasket on your lawnmower.
- Check for known symptoms like an oil leak or white or blue smoke.
- Open the engine's cover.
- Dismantle the engine's filters, dipstick, and carburetor.
- Find and remove the sparkplug.
- Dismantle the motor head.
- Look for scrapes, dents, or blasts around the gasket head.
- Skim for spigots and engine pistons' carbon residues.
- If you've proven that your lawnmower has a blown head gasket, you must replace it. If it's a false alarm, reconstruct all the parts.
- Turn on your lawnmower and inspect if an issue continues.
How To Fix A Lawn Mower Head Gasket?
There are several ways to repair a blown head gasket. But it depends on the severity of the damage. You can fix minor damages yourself by:
- Cleaning the head gasket and other parts with the help of old gas and a paintbrush.
- Using a head gasket sealant to block oil leaks.
A professional can fix it if the damage is severe. The cost will depend on the degree of the damage.
How To Replace A Lawn Mower Head Gasket
If you decide to replace your lawnmower head gasket, here are the tools and steps.
Here are the essential tools you need to replace the head gasket.
You'll need a wrench set to grip, loosen, and tighten nuts and bolts.
- Easy to access and organize
- Have stronger grip
- Made of heat-treated chromium-vanadium steel
Ratchet & Socket Set
These tools are essential in removing lawnmower head bolts and such.
- Polished and chrome-plated finish
- Large and easy-to-read markings
- Perfect fit for double hex fasteners
The screwdrivers are essential in removing various screws from your lawnmower.
- Easy to store
Long Nose Pliers
You'll need various pliers, especially long-nose pliers, to remove things like the fasteners from the valve cover.
- Has maximum gripping strength
- Made from durable nickel chromium steel
- Anti-pinch, non-slip ProTouch Grips
The torque wrench is used to tighten the cylinder head.
- Accurate and precise
- Durable and long-lasting
- Easy to use
The feeler gauge is used to set the valve lash.
- Easy to use
- Dually marked for easy identification
The plastic scraper tool is vital for cleaning and avoiding damage to the cylinder head, mower head, and block.
- Safe to use
Below are the simple steps for changing your lawnmower's head gasket.
- Extract the pull assembly and blower.
- Take out the carburetor.
- Withdraw the muffler.
- Open the valve cover.
- Extract the pushrods.
- Unbolt the head bolts.
- Clean the head and block.
- Fit the replacement lawnmower head gasket.
- A torque wrench to tighten the head fit push rods would be best.
- Put back all the parts in the opposite order.
- Oh, and don't forget to change the valve cover gasket and check if you have enough fuel.
How Much Does It Cost To Fix A Blown Head Gasket On A Lawn Mower?
If you choose to have your lawnmower fixed by an expert, you must prepare considerable money. A head gasket repair costs $1200 to $3000 and typically lasts up to 10 hours.
How Do You Maintain A Lawnmower?
You must practice these things if you want your lawnmower to reach its full potential and maximum lifespan.
- Change the engine regularly to avoid having bad fuel.
- Pour energy stabilizer into the power system to keep the fuel fresh. Or empty all petroleum if you won't use your lawnmower for more than a month.
- Change the spark plug with a brand-new one.
- Clean and buy a new air filter.
- Sharpen the blades after 20 to 25 hours of use.
- Grind or hone into balance the blades.
- Maintain the cleanliness of your equipment.
5 Care And Maintenance Tools For Lawnmowers
To avoid mishaps with your lawnmower, you must take good care of it and its parts. Here are essential tools for maintaining and fixing your machine.
Lawnmower Maintenance Kit
The lawnmower maintenance kit contains the necessary tools to tune up and fix your lawnmower.
- Easy to install
- High-quality steel
- Durable, sturdy, and waterproof
Wire brushes are perfect for the removal and cleaning of rust and oxidations, and other harmful exterior impurities.
- Various sizes
- Steel and brass
An engine cleaner is essential in cleaning and removing oil and filth from your lawnmower's engine.
- Removes grease, dirt, and grime
- Rinses clean with water
- No scrubbing
Blade Grinder And Sharpener
Your lawnmower's blade needs to be sharpened and balanced for effective use.
- Easy height adjustment
- Enhanced safety features
WD40 on your lawnmower's blades can keep the grass from clinging to the edges. It also helps keep the blades clean, sharp, and corrosion-resistant.
- Low-odor formula
- Safe on metal, plastic, and rubber
- Fast-acting formula
How Long Can Lawnmowers Last?
Most lawnmowers survive for more than ten years with proper care, attention, and maintenance. Otherwise, you can foresee your lawnmower lasting 4-5 years. And if you use and abuse your lawnmower, expect it to last for only two years or maybe even less.
When mowing your lawn, a blown head gasket is the last thing you need. Overheating, terrible fuel, wrong or advanced ignition timing, and engine knock are the main reasons for this phenomenon. Keep them in mind and avoid them at all costs.
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