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Check the oil level when the engine leaks oil. Drain oil to the full mark on the dipstick if you find the engine overfilled. A leaking head gasket or sump gasket can also cause oil leaks. Replace any damaged engine gaskets. If you notice gasoline stains on the pavement or garage floor, investigate the source of the leaking fuel.

Rebuild or replace the carburetor if it leaks gas.

lawn mower leaking oil from exhaust

Check the fuel pump for leaks and replace the pump if it's damaged. The carburetor mixes gas with air before the fuel goes into the cylinder. A damaged carburetor may also leak gas. Replace the carburetor if it causes any of these symptoms. When a lawn tractor engine surges or is hard to start, the problem could be a clogged or damaged carburetor. This DIY repair guide and video show how you can replace the carburetor yourself.

The carburetor mixes fuel with air to create a combustible mixture that enters the engine cylinder and ignites to drive the piston. Impurities in gasoline can clog the carburetor, preventing the engine from starting.

Lawn Mower Oil Leak Repair

Carburetor clogs can also cause the engine to run rough and the engine may stall when you try to drive the riding mower. Seals and gaskets in the carburetor eventually wear out and can leak gas.

Use a carburetor rebuild kit to refurbish a clogged or leaking carburetor. Does your riding lawn mower engine run rough or misfire? The carburetor might be clogged or worn. This DIY repair guide and video show how to rebuild the carburetor in a riding lawn mower in about an hour. If you notice an oil leak and your mower's engine can't reach normal operating speed or the mower struggles to climb a hill, the engine may have blown the head gasket.White Smoke from your mower looks pretty serious, but usually it's a simple fix.

So what causes white smoke from a lawn mower? This commonly happens after you've tipped your mower over to clean it, or you've over filled it with engine oil. But there are other possible causes:. Mower tipped over is the most common reason for white smoke. Usually, the customer turns over the mower to clean the deck or unclog the chute.

This allows oil to enter the cylinder, and when the mower is restarted, the oil burns and turns your yard into a 70s disco. Sometimes oil will also leak from the muffler. The fix is simple, check the mower for oil, and let the engine idle until the smoke clears. If your lawn mower is a tractor mower, white smoke usually means too much oil, carburettor fault, or blown head gasket. Lawn mower engines usually take a little over half a quart.

Lots of my customers add oil, without ever checking the level. They do this thinking it won't do the engine any harm. Too much oil can damage the engine, as most operate a splash lubrication system. When the oil level is above the splash paddles, they don't work efficiently. Don't damage your engine needlessly. I wrote the complete guide - shows you how dip your oil, oil types, quantity, how to drain oil, you can check it out here " How to check oil level ".

Tag: mower leaks oil from exhaust

The white smoke is the engine burning off all the excess oil. The fix - drain the excessive oil, and idle the engine until the smoke clears. This may take 5 minutes or so. Depending on your mower type, draining the oil can be a pain in the ass. I got this Briggs and Stratton oil extractoron Amazon, makes life soooo easy. Check out this page where I list some other mower repair tools you may find helpful, "Lawn Mower repair tools".

If your oil level is overfull and smells of gas, it's likely you have a failed carburettor seal. Don't run the engine as the oil is too thin and offers no protection. Change the oil after making repairs to the carburettor.

If you think this sounds like your problem, go ahead and replace the carburettor, it's faulty.Buying Advice. Pro Talk. Photos New media New comments Search media. Log in Register. Search titles only. Search Advanced search…. Today's Posts. Unread Posts.

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Thread starter Cdy Start date Nov 23, Cdy Forum Newbie. Joined Nov 23, Threads 4 Messages 6.

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I have a Craftsman push mower with a Briggs engine. The engine use to be easy to start, always on the first try. Lately it hasn't been so easy and sometimes I can feel it pull back when I pull it. Then the other day when I was using it, it started smoking terribly. White smoke. After I stopped it I noticed motor oil leaking from the exhaust.

Fix lawn mower blowing smoke

Any ideas? The mower has not been tilted at any great angle. KennyV Lawn Pro. Joined May 5, Threads 26 Messages 5,By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. It only takes a minute to sign up. In winter, I helped my grandparents remove the oil from the lawnmower.

Last month, we put in a new filter. Oil has gotten into it from turning the mower to the wrong side a few times apparently. New oil and gas was put in I don't know when it by whom. Supposedly by staff at the hardware store that sold the new filter. Today we put in the new filter and started it up. But white smoke was coming from the motor's exhaust together with oil. I've removed some of the oil since it seemed to be too much. However, the problem still stands.

I'm have no idea what the cause could be. Can anyone in here help me? Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Oil coming from the motor of a lawn mower Ask Question. Asked 3 days ago. Active 3 days ago. Viewed 14 times. Lithimlin Lithimlin 1 1 bronze badge. New contributor. Active Oldest Votes. Several potential problems come to mind: There is too much oil in the crankcase. Check the oil level and if it's not within the correct range either remove the excess or add until it's where it's supposed to be.

The engine has a problem with the valve seals, possibly just from age or from sitting around too long. In most engines this is a relatively easy fix but you may need to have a mechanic do it.

Too much oil or oil entering the combustion chamber has damaged the piston or the rings and now oil is leaking into the engine and being burned. This is a relatively major repair job.

Lithimlin is a new contributor.The engine on a lawn mower requires a constant stream of oil into the crankcase and piston. If oil leaks out of the tank or pump before it reaches the engine, the engine is at risk of severe damage. Stop the lawn mower immediately if you suspect an oil leak, troubleshoot the problem and fix the leak.

The oil sits in a reservoir close to the engine. On most four-stroke lawn mowers, a small oil pump delivers oil from the reservoir to the crankcase and piston. Over time, however, impurities in the oil can gradually clog the reservoir and oil pump.

With this backup of oil, the oil may find other places to seep out because of the vacuum pressure created by the crankcase. Another common cause of oil leaks is cracks when the seals heat and cool. Before you can stop an oil leak on a lawn mower engine, first locate the source of the leak. Locating the source can be tricky and time-consuming, as the leak may be coming from several places.

A good way to tell is to isolate the leak into a side of the engine. First, clean the entire engine block with a rag and a brush to remove any buildup of oil and dirt.

lawn mower leaking oil from exhaust

Then, run the engine again for several minutes. Stop the engine and inspect it closely for the leaking oil.

Oil leaking from exhaust

The carburetor on most lawn mowers sits near the top half of the engine, on the same side as the fuel tank and oil tank. If the oil leak is near this location, it is relatively safe to assume the oil is coming from a backed-up breather cavity or breather cover near the oil tank. Take the breather cover off the engine and clean the cover with a rag. Use a wire to poke the breather hole clean of any oil or dirt buildup.

Replace the gasket underneath the breather cover after cleaning it. If the oil leak is coming from the bottom of the engine, near the base, it is likely because of a problem in the oil tank or oil sump. Pull the oil dipstick out of the engine and reinsert it firmly. Restart the engine and check for an oil leak.

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If oil continues to leak, remove the oil tank and sump and replace the gasket underneath. Clean the oil tank thoroughly and check for any small holes in the bottom. Currently based in Minneapolis, Minn. He holds a Bachelor of Arts in creative writing from the University of Montana. Hunker may earn compensation through affiliate links in this story. Share this article.

Eric Blankenburg. Show Comments.Troubleshooting a lawnmower is a relatively simple practice that the average homeowner can accomplish. When you are troubleshooting a problem that is as large as a bad gasket on the engine, the telltale signs should allow you to make a quick determination. Examine the mower for any signs of oil leaking from the gasket. Depending on the style and brand of the mower, the head gasket will be in various places. If the gasket is leaking or blown, there will be a line of oil around where the two parts are held together.

If the mower is dropping out or not starting and you do notice the oil leak, you have a bad gasket. If the mower shuts off when you turn corners, but there is no oil leak, you may still have a bad gasket since the pressure to keep the combustion going is not strong enough.

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Smoke in the exhaust is one of the obvious signs that you have a problem with your combustion system. Because the gasket is the first thing to go and the easiest to replace, this is where you should start. The reason the mower will smoke when the gasket is bad is because oil is filling the chamber where the fuel is supposed to fire. Philip Powe started writing in for St.

Louis area newspapers. He has since written for "St. Hunker may earn compensation through affiliate links in this story. Share this article. Philip Powe. Show Comments.Oil leaking through a lawnmower's air filter has several possible causes. Some of those causes are simple to remedy while others are more serious problems that require complicated repairs. Sometimes a lawnmower puffs or spews smoke as it burns off excess oil. The lawnmower also may run poorly, shutter to a stop or fail to start.

If you tip a lawnmower greater than 15 degrees with its carburetor pointing downward, then oil can leak from the crankcase and into the breather tube. The breather tube is connected to the carburetor, which connects to the air filter. Tipping may occur while you change or sharpen the lawnmower's blade or clean the bottom of the mowing deck.

Mowing grass on slanted ground, such as mowing across a hillside, can tip the mower enough to allow its oil to flow toward its carburetor. Tipping the lawnmower so that its carburetor is on the high side helps to avoid the oil problem. Lawnmower crankcases are typically small, often requiring less than 1 full quart of oil. An overfilled crankcase pushes the excess oil in any direction the liquid can move. Although the excess oil often ends up in the cylinder, it also can move into the carburetor and out through the air filter.

The best way to avoid overfilling a lawnmower with oil is to add a little oil at a time, and then check the oil dipstick to see whether or not the oil level falls within the safe range, above the "Add" mark but not above the "Full" mark on the dipstick. A paper air filter soaked with oil must be discarded and replaced.

A foam air filter or foam prefilter, however, must be coated with a light application of oil in order to trap dust particles. Squeeze the excess oil out of a foam air filter or foam prefilter.

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Cleaning the carburetor also may be necessary. Internal problems that cause oil to leak through a lawnmower's air filter typically require repair by a small-engine specialist. Other internal engine possibilities causing the oil problem include a damaged cylinder or worn cylinder rings. All of those components block oil from entering spaces where it does not belong.

If they fail, oil can back up through the carburetor and into the air filter.

lawn mower leaking oil from exhaust

Robert Korpella has been writing professionally since He is a certified Master Naturalist, regularly monitors stream water quality and is the editor of freshare. Korpella's work has appeared in a variety of publications. He holds a bachelor's degree from the University of Arkansas. Skip to main content. Home Guides Home Home Improvement. About the Author Robert Korpella has been writing professionally since Customer Service Newsroom Contacts.