How To Stop A Lawnmower From Smoking

Smoke from your lawnmower can be troublesome and could leave you wondering if it needs servicing. Nevertheless, most smokes are harmless and do not signify a problem with your lawnmower. But how can you stop your lawnmower from smoking?

To stop a lawnmower from smoking, identify the reason for the smoke by analysing the colour. Oil spills could cause a cloud of blue or white smoke on the engine. You can stop this smoke by restarting your lawnmower and giving spilt oil time to burn off. Stop black smoke by cleaning the mower filter.

There are a few different causes of smoke from a lawnmower. So, let’s talk about the best ways to fix them!

How do you stop a lawnmower from smoking?

The way to stop a lawnmower from smoking will depend on what kind of smoke is blowing out of it. You need to understand what different colours mean to be able to stop a lawnmower smoking.

Black smoke may signify that your fuel system is not functioning properly. The carburettor does not allow enough air to mix with gasoline, so a higher percentage of gasoline is not being burned.

The black smoke indicates that the ratio of air and fuel is incorrect. A worn-out or dirty filter causes this incorrect mix. A dirty, clogged filter can also lead to insufficient air into the carburettor, causing incomplete combustion and black smoke.

Therefore, one way to stop your lawnmower from smoking is to remove the filter and clean it with soap and water. If the filter is worn-out, you can replace it with a new one.

Remember, different lawnmower models vary in brands, so it is advisable to consult the manual when cleaning the air filter. It should be mostly straightforward though: remove, clean, and replace.

After cleaning or replacing the filter, you can start your mower and let it run for a few minutes. The black smoke should be gone after this. If it doesn’t go away, there might be an issue with the lawnmower carburettor. When this happens, it’s best to take your lawnmower to a professional for mower maintenance and repairs.

What causes a lawnmower to smoke?

Sometimes the lawnmower emits a cloud of white or blue smoke due to oil spills to the engine from an overfilled oil reservoir. The situation can become worse if you mow on a 15-degree incline. The oil spill on the engine casing can also happen during maintenance routines.

You can solve this issue by running the lawnmower for a few minutes, allowing the machine to burn the excess fuel. If the problem persists, you should consult a professional to check for deeper issues.

Besides oil spills on the engine, white smoke may be caused by worn-out combustion chamber seals, resulting in oil leaks. Additionally, white smoke could happen because the cylinders and the rings are worn-out, leading to air leaks in the crankcase.

What does it mean when a lawnmower blows blue smoke?

White lawnmower smoke can also be caused by the malfunctioning of the head gasket, which will require professional attention to fix. Hiring a professional could be costly, but if your lawnmower is still under warranty, you can take it to the nearest service dealer for free.  

What does it mean when a lawn mower blows blue smoke?

When a lawn mower blows blue smoke, it usually means the machine has excess oil throughout the engine. The best way to solve this is to let the mower run for 10-15 minutes to burn off the excess oil. Once the excess oil is gone, the blue smoke should disappear.

Like white smoke, blue smoke happens due to oil spilt on the engine case, the lawnmower being tipped at 15-degree angles, and a damaged head gasket. A damaged head gasket in your lawnmower is an issue that needs to be addressed by a professional servicer.

Blue smoke from your lawnmower could also be caused by the oil residue of your new mower. If you upgraded your old lawnmower or bought a new lawnmower, you have a higher chance of seeing blue smoke when you first start the engine. As we mentioned, you should leave the mower to run for 15 minutes until the smoke dissipates. If the smoke continues after this time, take the mower to be serviced.

Why is my lawnmower blowing grey smoke?

When you see grey smoke from your lawnmower, it is a sign of the engine burning oil. This is a sign that the engine is worn out and is burning too much oil. Grey smoke is more common in older lawnmowers that have had their fair share of mowing use.

Grey smoke could also signify that the lawnmower’s oil levels are near depletion. Low oil levels could cause serious damage to the engine, hence the need to regularly top off the oil.

A lawnmower could also blow grey smoke because of burning oil in the combustion chamber. This is a result of bad piston rings or leaky valve seals. Although these cases don’t immediately damage the engine, they’re a sign that your engine is nearing the end of its life. This is when it’s a good idea to start checking out new mowers, such as a Husqvarna LC219P push mower.

If you’re not ready to buy a new mower, you can get a mechanic to try and fix the piston rings and valve seals.

Can too much oil in a lawn mower cause white smoke?

Excess oil in a lawnmower can easily spill on the engine during cleaning and maintenance, causing white smoke. Excess oil will also spill off if you tip the mower at a 15-degree angle. When you start the lawnmower, the engine will burn the excess oil, blowing white smoke.

Why is my lawnmower blowing grey smoke?

To stop a lawnmower from blowing white smoke, you can let the mower run and burn off excess oil for 15 minutes. This is without you moving it to mow anything. After about 15 minutes, the lawnmower should stop smoking, unless there is another cause for this issue.

If your lawnmower has too much oil, you may struggle to start it. The oil could also reach the lawnmower’s crankcase, causing an overflow. An overflow affects the crankcase’s functions.

Too much oil could leak from the lawnmower and result in a fire hazard. Fuel leakage could cause a fire in your garage. Leaks can also result in the malfunctioning of the lawnmower and damage the soil.

It’s important to properly service and maintain your lawnmower’s condition to prevent the lawnmower smoking. But if smoke does occur, most of the time it should be an easy fix.

If you’re looking to have your mower serviced, bring it down to our professional servicing team at Canberra Diamond Blade Suppliers. Check out our store for all your gardening and construction tools and needs while you’re at it!

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