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Champion petrol mower ran low on fuel – was refilled and now misfires
Experienced athletes share their insights in answering this question:
I suspect that there may have been dirt at the bottom of the tank or possibly water. Try changing the fuel filter but first clean the tank and refill with clean petrol

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Low Fuel

A common reason why a lawn mower won`t start is low fuel. While that might sound a bit too obvious, low fuel could be the reason your lawn mower won`t start, especially if you had previously used your mower for an extended period without refueling.

Old petrol in your mower can go bad in as little as 2-4 weeks, so it`s important to only put as much fuel in your mower as you need, and to drain it before putting it into storage over the winter months.
As the fuel level drops, a vacuum begins to form in the fuel tank because air can get in to fill the space the consumed fuel occupied. After about 10 or 15 minutes, the vacuum will become strong enough that fuel will stop flowing to the carburetor and the lawnmower will die.
The most common cause of a mower that runs for thirty minutes and then dies is a faulty armature. A faulty gas cap is the second most likely cause.
An airlock is one of the common causes why your mower won`t start after running out of fuel. An Airlock occurs when air replaces fuel in the fuel lines. As you refill your fuel tank, you could push the air towards your mower`s carburetor, which keeps the new fuel from reaching the engine.
Many cars simply won`t start at all if there is a very low fuel level in the tank, even if there`s enough fuel to drive for a few miles. In general, it`s a bad idea to drive around with an extremely low fuel level in your tank.
The storage life of petrol is one year when stored under shelter in a sealed container. Once a seal is broken the fuel has a storage life of six months at 20°C or three months at 30°C. The storage life of petrol in equipment fuel tanks is one month.
What is this? As a rough rule of thumb, a single-cylinder mower with 500-750 hours would be considered a high miler, but that`s not to say it`s all worn out. A well-maintained mower will go on and on, as said earlier, my own ride-on mower has about 1000 hours and still pulls its weight around here.
A Dirty Carburetor Can Cause a Lawnmower To Start Then Die

By far, the most common issue that causes a stalled motor is a dirty carburetor. The carburetor on your engine is the thing that draws in air and mixes it with the fuel. Contrary to what the movies might make you think, gasoline itself is not very flammable.

Loose, Dirty or Disconnected Spark Plug in Your Lawn Mower: Check it out, clean off debris, re-connect and tighten. Dirty Air Filter: Clean or replace. Fuel Not Reaching the Engine: Tap the side of the carburetor to help the flow of gas. If this doesn`t work, you might need a new fuel filter.
Use Carburetor Cleaner

Fortunately, you can generally do this without even taking the carburetor out of the engine. Start by purchasing some commercial lawnmower carburetor cleanerOpens a new window, which comes in a simple spray can and will make it easy to clean the inside and outside of the carb.

A full gas tank and oil reservoir are the essential first steps when checking why the lawn mower won`t stay running, but the problem could also be a dirty filter, clogged carburetor, improper fuel mixture, or a dirty spark plug.
If you keep your mower in the basement during the winter, you should remove the fuel regardless of how much is left because storing it inside could be a fire hazard. If there`s only a little fuel left after the last mow of the season, your best bet is to run the tank dry.
The quality of your drive can be compromised by low fuel levels. Should your tank run so low that it begins to dry out, it will have a domino effect, causing your brakes to fail, your power-steering to crank up and, in some cases, a total loss of control over your vehicle.
Car care experts recommend not letting your fuel level drop below ¼ tank. There are a few reasons for this: It could leave you stranded. If you run out of gas, your car`s engine will stop — and you`ll be stuck whenever and wherever it happens.
Operate your mower at a safe operating speed. Usually 3 to 5 MPH. This will cut the grass cleanly and thoroughly. Mowing height – When you mow turfgrass too short you can get weeds, diseases, and a thin canopy.
The average residential mower is used for 1-2 hours per mow with 35 cuts per year. Based on that usage, a lower-quality line of residential mowers is expected to last 450-500 hours, while a John Deere residential lawn mower will last around 1,000-1,500 hours.
hours to mow one acre x 60 minutes = minutes to mow one acre

Here`s an example: if the normal, safe mowing speed of a 21″ walk-behind is 3 mph, then multiply 3 x 18.9 inches (0.9 x 21″) to get 56.7. Divide 108.9 by 56.7 and get the answer 1.9206 or 1.92 hrs. Multiply that by 60 minutes to get the answer of 115 minutes.

Possibly, although that largely depends on what the fuel is and how old it is. If you use old petrol, you may suffer poor starting and, or loss of performance. You`ll probably be able be able to overcome this by filling up with fresh petrol.
Degradation occurs from the get-go but most gas stays fresh for a month or two without issue. However, gas that is more than two month old is generally OK to use with only minor decreases in performance. Gas that is older than a year can cause issues, like engine knocking, sputtering and clogged injectors.
As lawn mowers will struggle with grass that is too long, the grass trimmer provides the perfect alternative to removing the top layer of grass. Once you have taken off a good chunk of grass, you should water your lawn and then leave it to recover so as not to over-stress the grass. This will help in the long run.
How long it lasts after that depends on how well it`s been maintained. PenningsLandscaping: Maintain the mower and put about 2,000 hours on it, then sell it and buy a new one if you don`t want to dump money into it. Two thousand hours is generally the number you`ll hit without any major repairs.
The spark plugs are worn or damaged

If you find that your lawnmower keeps dying, or keeps stalling while cutting grass, then inspect the spark plugs. Look for signs of damage or wear. Something as simple as a cracked porcelain insulator can mean an electrode has been damaged or burned away.

Other things that could cause this issue are bad fuel, weak/colapsed/kinked fuel line, faulty spark plug, faulty ignition/coil, oil over full, clogged air filter, plugged/dirty carburetor, worn engine parts internal rings/valves/etc.

Discover Relevant Questions and Answers for Your Specific Issue

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Champion petrol mower ran low on fuel – was
ANSWER : I suspect that there may have been dirt at the bottom of the tank or possibly water. Try changing the fuel filter but first clean the tank and refill with clean petrol

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2005 4 stroke yamaha 150 550hrs. normally use every week but due to surgery not used for 10weeks. Just before I went down I changed internal fuel filter, and zincs in motor. finally put in sunday. motor started fine left dock hit the power and started to come up on plane then stuttered and died. changed the external fuel/water seperator pump up the primer and started up again. with in a minute died down again. limped back to dock checked fuel filter and plug wire connections. pumped up primer and left dock went right onto plane for maybe 150yds then coughed and died. I could pump up primer and it would run but then die out. the fuel filter at the front of the engine would run dry until I pumped it up again. If it were a car I would suspect a leak in a fuel line but I can’t find any sign of one.
before we launched I put 10 gallons of fresh fuel in and added another bottle of ethanol stabilizer (CRC brand)
what proceedure should I follow to isolate the problem? I am a fairly competent mechanic as far as cars and trucks go. I don’t really want to have to take it to a marine mechanic.
ANSWER : This is going to be the fuel pump is not pumping any fuel. The primer is acting as a fuel pump. When you prime it, it gives the engine enough fuel to run for a little bit. But as soon as the fuel runs out, the engine is dying. So this is going to be a bad fuel pump.

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My 1977 Evinrude 140 HP outboard engine looses power when it hits @4,200 rpm’s and goes down to 3,500 then back up to 4,200 and then back down to 3,000 or about there. This would continue if I didn’t slow down to 3,000 on my own. It runs fine at @ 3,000 when I slow it down. I have changed all the fuel lines from the fuel tank to the carbs, removed, cleaned out the fuel tank, put new gas and added a can of SeaFoam. I replaced the water seperator filter and cleaned the fuel filter. I feel the fuel pump is operating OK. Any ideas about what could be causing my problem? Could it be a bad power pack or stator? Help!!
ANSWER : Hi, this is obviously a stator problem since you have cleaned the fuel filter..

Take care

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09 kx250f fuel leak
ANSWER : Sounds like your carb is dirty inside. make sure its out of warranty first, (don’t want to void it), then pull off the bowl at the bottom of the carb and clean it. Try to avoid useing acetone based cleaners as this can sometimes ruin some seals/gaskets/components.

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Water in the fuel tank of my Zodiac dinghy with Yamaha 2001 50 HP
ANSWER : I’d add a little dry gas to **** up any remaining water and give it a shot

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I have a Husqvarna 570 that quit running, It idled for about 30 sec. and shut off. It has spart and the plug is wet, its getting fuel. Had the ignition tested and fuel lines. checked fly wheel and timing. Seems like it is getting too much fuel and after a few pulls fuel runs out of the exhaust?
ANSWER : Hi keachfamily4…

Sounds like you have dirt/debris in your carburetor jets or fuel passages but for sure under your inlet needle valve. This problem will cause fuel to come out of the exaust, and carburetor at times.
Follow the directions below and you will be able to get your Husqvarna 570 running again.
Make sure you are using fresh fuel…and oil mix if your using a two cycle mower or weedeater with the oil to the right mixture and not too much oil as it can cause hard starting.If the mower/weedeater is over a couple of years old, then I recommend that you buy and install a new carburetor repair kit,because the diaphragm will get hard and that will cause it to be hard to crank.Sounds like you will need to clean the carburetor or replace your carburetor internal rubber parts like the diaphgram and O rings.I recommend that you use a laquer thinner type cleaner to clean and dissolve the laquer build-up in the float and needle jet passages.Be sure to remove all plastic and rubber parts before using the laquer thinner because it can dissolve the plastic parts and render them unuseable.Be sure to use compressed air to blow out all the fuel and air passages.Be careful when blowing out the passages, because there are sometimes small rubber type seats in the bottom of some of the passages.Sometimes you can get by with priming the carburetor or using starting fluid and letting it run a few times like that and it will flush the gunk out of the jets,but most of the time you will need to rebuild the carburetor.Keep in mind that the float (if you have one) for the carburetor must be level when you go to reassemble the carburetor or follow the instructions you get with the carburetor kit.When you clean your carburetor and remove the jet screws, you will first need to lightly seat the jet screws.But before you lightly seat the jet screws count the number of turns it takes to seat the jet screws from their original position.Be sure to mark the turns down on a piece of paper.That way when you put the jets back in, you know to lightly seat them first and then turn them back out to their orginal position before you started.Once you have your carburetor rebuilt and reinstalled that should solve your problem.
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LX 188. Engine suddenly dies. The fluel in the bowel of the fuel filter is empty. If I crank the engine the filter becomes dry and is collapsing some but the engine does not start. When I remove the supply line from the fuel pump to the carberator and crank the enginge there is a strong stream of gas being pumped out. I tap on the carberator ??? is the float is hung not allowing fuel to enter. Cranking the engine with the line off refills the bowel of the gas filter. Reattache line to the carberator===engine starts. Ran perfect for 20minutes then suddenly died. Repeated all the above and engine again started. What to do to fix this? Thanks
ANSWER : Debrie inside the needle and seat area which has to be cleaned out with carburetor cleaner and compressed air

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My name is Elena Jones, and I am a blog writer who loves sports and fixing and troubleshooting sports machines.
I also love the challenge of fixing and troubleshooting sports machines. I find it satisfying to be able to take something that is broken and make it work again.