An Excessive Amount of Oil Inside of a Husqvarna Mower (This Can Happen)

You keep a close eye on the amount of engine oil to make sure it doesn’t drop too low and ensure that you keep up with any necessary oil top-offs. On the other hand, you put in an excessive amount of oil, and as a result, your Husqvarna is giving you trouble.

When there is an excessive amount of engine oil in a Husqvarna lawn mower, the engine may get hydrolocked, which may result in damage to the seals, blown gaskets, and overheating.

You may be able to simply solve your issue by adjusting the amount of engine oil in the vehicle, but it’s also possible that the solution won’t be quite that straightforward. It is possible that the engine will be damaged as a result of the pressure that builds up within the tank.

First, your engine has to be allowed to cool down before you can remove the spark plug boot(s) and begin diagnosing and fixing the issue.

Husqvarna mower

5 Consequences of Using an Excessive Amount of Engine Oil in a Husqvarna Lawnmower

1. Damage to the Engine Seal on a Husqvarna Lawn Mower’s Engine

When you pour an excessive amount of engine oil into the crankcase, the pressure within the crankcase will begin to rise. Because of this pressure, the seals may be blown out, which may result in oil leaking out of the engine.

In the event that you are unable to locate the oil leak in a timely manner, you run the risk of blowing up the engine as a result of it running out of oil.

When there is not enough oil in the engine, heat will begin to build up inside of it. When the temperature rises to a high enough level, the intensity of the heat may cause a rod to spin or even fuse it to the crankshaft.

The extreme heat has the potential to both shatter the rod and force it out of its housing in the engine block. It’s possible for the piston to weld itself to the cylinder, which would then cause the cylinder to get stuck.

2. A Husqvarna Lawnmower’s Engine May Become Overheated

If there is an excessive amount of oil in the engine of a Husqvarna lawn mower, the crankshaft and rod will be unable to operate freely because they will have to push through more oil.

This results in an increase in the pressure inside the crankcase, which puts additional strain on the components found within the engine.

Both the rocker arm and the valve spring will get warm. There is a possibility that the oil may not flow as it should, which would result in increased heat. Aluminum, the material with which most engines are constructed, heats up to extremely high temperatures, which makes the situation even worse.

When the engine gets to be a certain temperature, a valve guide or a valve seat may become loose from the engine block and fall out. If this occurs to your engine, you will need to have it scraped out by an expert small engine repair. This may be done at your own expense.

3. A Husqvarna Lawn Mower’s Engine Might Freeze Up on Occasion

When there is an excessive amount of oil in the cylinder, the engine will have a difficult time turning over. Because of the wear on the rings, it is possible that the engine may become inoperable if the oil gets past them. This phenomenon is referred to as being hydrolocked.

Oil is present in the combustion chamber, which is not as it should be since it should only contain air and a trace quantity of fuel.

Because the piston is unable to compress the oil when the pressure is increased, the system gets hydrolocked. When you try to start the engine, there is a strong chance that the piston may bend, which will prevent the engine from starting.

4. The engine of a Husqvarna Lawn Mower could not run very well and might smoke.

If there is too much oil in your engine, there are occasions when it will still operate, but the performance won’t be great. An excessive amount of engine oil may make its way up to the spark plug, which can cause the plug to get clogged.

The oil prevents the spark from occurring, which is essential for the fuel to be ignited correctly.

It’s possible that oil got into the valve train of your lawn mower, which is another reason why it could not operate as smoothly as it should. When this oil is burnt in the cylinder, you will notice that you are surrounded by a dense cloud of odorous smoke that is white blue in color.

When the air filter gets clogged, the engine may suck air and oil out of the crankcase in addition to producing smoke.

5. A Husqvarna Lawn Mower’s Engine Could Possibly Blow Its Gaskets

The engine issues that might arise with a Husqvarna push mower, riding mower, or zero-turn mower are, for the most part, identical. The extreme heat generated by overfilling the oil reservoir might cause the gaskets to rupture.

Due to the need of removing the engine from the lawn mower in order to replace the gaskets, the cost of repairing a twin-cylinder engine is higher than the cost of repairing an engine for a push mower. This is because extra work is required.

In Summary

Adding a little more oil may not seem like a big problem, but in reality, it is a tremendous matter that can result in the need for expensive repairs or even the replacement of the engine.

Therefore, while changing the oil or adding oil, be sure to check it again and only add the amount that is necessary by the manufacturer of your engine. Do not make the assumption that exceeding the necessary quantity would be tolerated.

When using your Husqvarna, stop immediately if you become aware of any engine difficulties. If you are having difficulties with your engine that cannot be resolved by changing the oil or doing other simple repairs, you should get in touch with an expert small engine mechanic.

The mechanic will put the engine through a series of tests in order to evaluate whether or not it can be fixed or if it should be replaced.

Step-by-Step Instructions on How to Drain Excess Oil From a Husqvarna Lawn Mower

In the event that you overfilled the engine oil, you will need to bring it back down to the appropriate amount. To ensure your own personal safety, the first step is to disconnect the wire connected to the spark plug. There are a few distinct approaches you may use in order to drain the motor oil from your Husqvarna mower.

  1. Find the Drain Plug or Valve Port: If your lawn mower has an engine, you will need to locate the drain plug or valve port on the engine. It is possible to locate it either on the side of the engine next to the dipstick or at the bottom of the oil pan located below the lawn mower.
    Have your drain pan ready to collect the oil. Remove the plug for a quick second and replace it. Check your oil level.
  2. Oil Filter: If your engine has an oil filter, you may drain a little oil by removing or just loosening the oil filter in order to drain a little oil. This is only necessary if your engine employs an oil filter. Prepare a cloth to soak up the oil and keep it nearby.
  3. Fill Hole: There is a possibility that your mower does not have a drain plug or an oil filter. Because many of the smaller engines used on push mowers lack a drain cap, you will need to tip the mower over in order to pour a little oil out of the fill hole.
  4. Oil Extractor Pump: When it comes to oil removal, an oil evacuator does a good job. Oil will be extracted using an extractor, which consists of a tube that is placed into the engine’s oil fill hole.
  5. Turkey Baster: If you just need to remove a tiny bit of oil, a turkey baster should do the trick. After you have used it in your vehicle’s engine, you should not put it back into circulation for use in the kitchen. The cost to replace one of them is not too high.

How to Ensure That Your Husqvarna Lawnmower Does Not Have Too Much Oil

Find out how much engine oil your lawnmower holds by consulting the owner’s handbook before you attempt to replace the oil in the engine of your lawnmower.

If you don’t have access to the owner’s handbook for your vehicle, you can always look up the crankcase capacity using Google or another search engine of your choosing.

The majority of the smaller engines used on push mowers need around three quarters of a quart of motor oil. In most cases, a V-twin engine will need around 2 quarts of fuel.

A bigger commercial lawn mower engine, sometimes known as a “big block,” has the capacity to hold three quarts of engine oil. It is generally accepted that these more powerful engines have at least 34 horsepower.

Knowing the capacity of your engine’s crankcase and adding no more than a half quart of oil at a time is the most effective approach to avoid overfilling your engine with oil. Continue to check the oil until you reach the target level.

If you are adding the oil half a quart at a time, as you come near to having it full, add just a tiny bit at a time and check the oil level using the dipstick or the oil gauge.

Will Adding an Excessive Amount of Oil to a Husqvarna Lawn Mower Prevent It from Starting?

Your Husqvarna vehicle’s engine could not start if there is an excessive amount of engine oil. The oil pan on the smaller engines that are often seen on lawn mowers is typically rather compact.

When there is just so much area, there isn’t much wiggle room for mistakes. When an engine has an excessive amount of oil added to it, the engine might hydrolock.

The condition known as hydrolocking occurs when oil gets past the piston and into the cylinder at the same time. When this happens, the combustion chamber becomes filled with oil, which prevents the piston from moving all the way to the top of the chamber.

Air, and not liquids like oil or water, is what the piston is meant to compress. The oil will not compress, and because of this, it will not allow the piston to move when you pull on the rope or start the engine with a starter. The condition that results from this is known as being hydrolocked. 

An excessive amount of oil might also clog the spark plug, which would prevent the engine from starting. When there is too much oil in an engine, it may cause additional problems, such as oil flowing into the carburetor via the valve train, which prevents the engine from starting.

It’s possible for this oil to make its way past the carburetor and into the air filter, both of which would prevent your engine from starting.

Continue to Experience Difficulties with Your Husqvarna Lawn Mower?

Check read my guide on the most frequent issues that other Husqvarna owners have reported experiencing with their lawn mowers if you are still having issues with the mower you purchased. I prepared a chart to help identify the causes of many issues, such as beginning, smoking, cutting, vibrating, and dying, as well as potential remedies to these issues.

This advice may be found at the Common Husqvarna Lawn Mower Problems & Solutions website.

In the event that you are not confident in your ability to diagnose and execute repairs on your Husqvarna lawn mower, it is in your best interest to seek help from the Husqvarna dealership or lawn mower repair shop in your area.

In order to prevent injury or further damage to the mower, you need to keep yourself safe and only conduct repairs that are within your mechanical capabilities.