An Excessive Amount of Oil Inside of a Toro Lawnmower (This Can Happen)

You decided to add engine oil to the crankcase, and as a result, you are now having some problems with your lawn mower. Is it possible that you clogged the oil reservoir of your mower by adding too much oil?

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

There are a variety of issues, some of which may be quickly resolved by adjusting the quantity of engine oil, while others may be more important and call for the services of an expert small engine repair. I’ll go through them in the next paragraphs.

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.

outdoorstip Toro Lawn Mower

5 Consequences of Using Excessive Amounts of Engine Oil in a Toro Lawnmower

1. The Engine of a Toro Mower May Get Overheated

Since there is an excessive amount of oil in the Toro engine, the crankshaft and rod will be forced to work against the extra oil and will not be able to move freely.

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 cause heat. This issue is made much worse by the fact that the majority of engines are constructed out of aluminum, which generates even more heat.

As 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.

2. Damage to the Engine Seal on a Toro Lawn Mower Engine

The crankcase pressure will rise if you add excessive amounts of oil. 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 do not detect blown seals in a timely manner, you may wind up with a blown engine as a result of not having enough oil. Because of this, a heat will be generated that is so intense that it will cause the engine to get so hot that it will spin a rod or fuse itself to the crankshaft.

This high level of heat may also cause the connecting rod to snap, sending it flying to the other side of the engine block. It’s possible for the piston to weld itself to the cylinder, which would then cause the cylinder to freeze up.

3. A Toro Lawnmower’s Engine Could 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.

When the piston is unable to compress the oil when the pressure is increased, the system gets hydrolocked. As 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 Toro lawn mower may not run very well and even smoke.

When there is an excessive amount of oil in the crankcase of the engine, you run the risk of it not functioning properly. An excessive amount of engine oil might contaminate the spark plug and cause it to fail.

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 has the potential to reduce the power of your Toro mower and make it operate roughly.

It’s possible that oil got into the valve train of your lawn mower, which is another reason why it could not operate very well. 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. If you are seeing smoke coming from your Toro mower, you should check out this post.

5. There Is a Risk That the Engine on a Toro Lawn Mower Could Blow Gaskets

The engine issues that might arise with a Toro 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.

Thus, 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.

If you discover engine difficulties when using your Toro, you shouldn’t continue to use it. 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.

A Step-by-Step Guide to Draining Extra Oil From a Toro 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 various approaches you may use in order to drain the motor oil from your Toro 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.

    Prepare the drain pan you want to use to collect the oil. After removing it for a brief period of time, reinstall the plug. Make sure the oil level is correct.

  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. Since 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: A turkey baster is an effective tool for draining out minute quantities of oil. Once 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 Toro 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.

Would an Overfilling of the Oil Container on a Toro Lawn Mower Keep It from Starting?

If there is an excessive amount of engine oil in your Toro, it may be unable to operate. The oil pan on the smaller engines that are often used in lawn mowers is typically rather compact.

Because 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 Have Difficulties with Your Toro Lawn Mower?

It would be great to have a lawn mower that never gave you any difficulty, but sadly, this is virtually never the case. If you retain your mower for a longer period of time, regardless of the brand it is, there is a greater possibility that you may have problems with it.

In order to aid you in diagnosing any difficulties that you may be experiencing with your Toro mower, I have included a list of common problems, along with their likely causes and potential solutions. I hope that this will be of service to you. Seeing Common Toro Lawn Mower Problems and Solutions can provide you with further knowledge that you may need.