Troubleshooting a Blown Head Gasket on Your Lawn Mower: Tips and Tricks


Share post:

Blown head gasket on lawn mower – this is one of the most common problems that every lawn mower owner encounters after a certain period. It is quite frustrating to face such an issue as it can lead to reduced performance, overheating, and even permanent engine damage if left unchecked.

If you have been experiencing loss of power or smoke from your lawn mower's exhaust, then there is a high possibility that your machine has blown a head gasket. This can happen due to a variety of reasons such as overheating, low oil level or quality issues in the gasket itself.

Luckily, fixing this issue isn't impossible but requires proper knowledge and tools. In this article we will provide you with all the necessary information about blown head gaskets on lawnmowers including causes symptoms and fixes so that you can bring your machine back into full working order once again. So get ready for some valuable insights!

Blown Head Gasket on Lawn Mower: The Ultimate Guide

If you own a lawn mower, it's likely that you have experienced some issues at one point or another. One of the most common problems that people face with their lawn mowers is a blown head gasket. This can be frustrating and cause your mower to stop working altogether, leaving your lawn unattended. In this guide, we will discuss what a blown head gasket is, how to diagnose it and what steps you can take to fix it.

What is a Blown Head Gasket?

The head gasket in your lawnmower engine sits between the cylinder block and the cylinder head. Its primary function is to seal these two components together while ensuring that oil flows properly throughout the engine. When it fails or becomes damaged due to excessive heat or other factors like old age or incorrect maintenance practices; coolant may leak into cylinders leading up to an overheated engine.

This leakage leads towards combustion chambers of an internal-combustion engine which causes multiple problems such as misfires because coolant enters combustion chambers which isn't exactly combustible fuel like gasoline creating steam rather than ignition for detonating fuel mixture properly within engines' cylinders during operation.

Signs of Blown Head Gaskets

If you suspect that your lawn mower has a blown head gasket, there are several signs that you should look out for:

  • Loss of Engine Power: If there's not enough pressure within an internal combustion chamber then power output would drop significantly.

  • White Smoke from Exhaust: Another sign could be white smoke coming from exhaust pipes; this indicates coolant mixing with oil inside cylinders causing hydro-locking

  • Overheating Engine: A telltale sign would also include overheating since coolant isn’t flowing through circulation passages correctly due faulty sealing between surfaces mentioned before

  • Aerated Coolant Reservoirs : Air bubbles in cooling system which means they're not circulating correctly.

  • Milky Oil: An oddity to look out for would be milkshake-like consistency in oil which indicates the coolant is mixing with lubricant because of a blown head gasket.


If you've noticed any of the above signs, it's time to diagnose your lawn mower. Here are some steps to follow:

  1. Drain the engine oil and check its condition.
  2. Check for contaminated coolants by examining it physically or chemically using test strips if available
  3. Remove spark plug and examine its tip for possible moisture buildup
  4. Conduct a compression test on every cylinder individually using an air-pressure gauge

If all these checks indicate problems, then you should go ahead with repairing your engine head gaskets.

Repairing Blown Head Gaskets

Repairing a blown head gasket can be done at home or by taking it into an automotive repair shop that specializes in small engines repairs particularly mowers .

The first step towards fixing a blown head gasket is removing all parts that will impede access such as carburetor, exhaust manifold, valve cover etc..

Then remove cylinder heads from block after loosening bolts holding them together; inspect them visually before moving forward because sometimes surfaces may need reconditioning services provided by machine shop (if needed).

Once this is done either replace damaged components like Cylinder heads or simply repair existing ones through resurfacing

Next up replacing new parts plus related seals & torque specifications have been met before assembly followed closely behind running leak-down test — which helps identify whether there are any leaks still present – while monitoring temperature gauges during this process ensures everything runs within optimal limits without overheating again quickly due further damages caused post-repair activities.

Prevention Tips

Prevention techniques boil down to maintenance practices such as proper lubrication intervals between oil changes based upon manufacturer’s specification being followed correctly ; avoiding running engines past recommended heat thresholds; ensuring cooling systems are clean of debris and using recommended coolants for specific engine models.

In conclusion, a blown head gasket on your lawn mower can be frustrating but it is not the end of the world. With proper diagnosis techniques, you'll save yourself some money by repairing it instead of replacing expensive parts . Also following best maintenance practices will make sure your engine lasts longer without running into issues like these!


What is a blown head gasket on a lawn mower?

A blown head gasket in a lawn mower is when the seal between the cylinder and engine block fails, allowing oil and coolant to mix with exhaust gases. This can cause several problems, including reduced power output, overheating, and white smoke coming from the exhaust.

The head gasket acts as a seal between these two parts of an internal combustion engine. When it fails or breaks down due to age or wear and tear, it can cause significant damage to other components in your lawn mower's engine if not fixed promptly.

A few signs that your lawnmower may have suffered from this issue include rough running when starting up or idling; poor acceleration; excessive oil consumption accompanied by blue smoke coming out of the muffler pipe; coolant loss without any visible leaks under the hood.

To prevent further damage to your lawnmower's engine system and maintain its performance levels, you should have any suspected issues related to blown headgaskets checked by an expert immediately

How do you know if you blew a head gasket on your lawn mower?

Several symptoms indicate that there might be such an issue in your lawnmower. One common sign is visible white steam emitting out of the muffler while running. Another symptom includes power reduction—your motor may lose horsepower because hot gases escape past failed seals into coolant channels instead of pushing pistons down where they generate force for propelling blades etcetera)

Other common signs include overheating – due to insufficient cooling caused by mixing oil/coolant with fuel resulting in less efficient heat exchange at high temperatures which then leads into dangerous situations like melting plastic parts -, damaged spark plugs leading lower compression inside cylinders as fuels ignite at different times than originally intended before being compressed enough causing uneven torques acting upon flywheel shafts which could lead eventual seizing up altogether

In case you experience one or more of these symptoms mentioned above, you should take your lawnmower to an expert repair shop immediately to avoid further damage.

How much does it cost to fix a blown head gasket on a lawn mower?

The cost of fixing a blown head gasket for your lawn mower depends on several factors such as the extent of the damage and the type of lawnmower you have. On average, repairing this issue may cost between $100-500.

The expense includes parts replacement (head gaskets, intake/exhaust manifold gaskets, water pumps), labor costs depending upon how long it takes them (usually ranging from 2-4 hours), and any additional repairs that might be required if other engine components are damaged due to overheating or lack of proper lubrication caused by oil/coolant mixing with fuel inside combustion chambers

It is always recommended that you get quotes from different repair shops before settling down with one contractor since prices may vary significantly based on their location or experience levels.

Can I fix a blown head gasket myself?

Fixing a blown headgasket yourself can be done in some cases but requires advanced mechanical knowledge and skills. The process starts by disassembling parts around the engine bay like air filters and fuel lines using special tools for removing screws/bolts/nuts holding metal plates together tightly against each other which could otherwise leak fluids/gases under high pressure over time causing noticeable performance drops like loss horsepower during operation etcetera)

You will also need new replacement parts such as Head Gaskets themselves along with Intake Manifold Gaskets & Exhaust Manifold Gaskets which help seal off hot gases escaping past failed seals into coolant channels instead pushing pistons down generating force propelling blades respectively). You must follow manufacturer guidebooks/manuals closely while replacing these components back into their original positions after cleaning excess debris/dirt accumulated overtime inside cylinders making sure not over-tighten bolts/screws/nuts risking possible block/valve damage

Due to the complexity of this procedure, it's always best to have a professional at a repair shop handle the job if you aren't confident or don't have sufficient knowledge in repairing engines. Attempting it yourself can cause further damage leading to more expenses and longer downtimes for your lawnmower.

How long does it take to fix a blown head gasket on a lawn mower?

The time taken for fixing this issue largely depends on various factors such as the extent of damage, type of engine, and availability of replacement parts. Typically, an experienced mechanic should be able to replace your head gasket within 2-4 hours.

However, suppose other engine components are damaged due to overheating caused by mixing oil & coolant with fuel inside combustion chambers (pistons connecting rods etcetera). In that case, more extensive repairs may be required prolonging downtime till all affected parts are replaced/repaired – which could range from anywhere between 1-3 days before final testing is done ensuring everything works correctly before returning it back into service again.

It’s always recommended that you consult with your repair shop beforehand so they can give you an accurate estimate regarding both cost and duration depending upon how severe things look based on their experience levels gained over years working in this field!


Please enter your comment!
Please enter your name here

Related articles

Toro Self Propelled Lawn Mower with Side Discharge Chute – Your Guide to Efficient Grass Cutting

Looking for a reliable and efficient lawn mower that will make your gardening tasks easier? Look no further...

Top 5 Best Riding Lawn Mowers Under $2000 for a Perfectly Manicured Lawn

Are you looking for the best riding lawn mower under 2000? Look no further! In this article, we...

Troubleshooting Snapper Self-Propelled Lawn Mower Problems: A Comprehensive Guide

Are you having trouble with your snapper self-propelled lawn mower? Do you find yourself having to constantly troubleshoot...

Ryan Lawn Mower: The Ultimate Guide to Achieving a Perfectly Manicured Lawn

Are you tired of spending countless hours mowing your lawn every week? Look no further than Ryan Lawn...