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The float in the carburator is stuck open. fresh fuel, and a carb cleaning is the place to start.
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Gas leaks around the lawn mower air filter can indicate your engine valves are not working properly. If your engine has a fuel shut-off valve, ensure that this valve is closed when the engine is not in use.
If the lawn mower leaks gas the carburetor bowl gasket on the bottom of the carburetor might be dried out or missing. If the leak is coming from the bottom of the carburetor, try replacing the carburetor bowl gasket.
A dirty carburetor is one of the most common causes for a lawn mower not being able to start after sitting unused for months or years at a time.
Your lawn mower`s air filter guards the carburetor and engine from debris like grass clippings and dirt. When the air filter becomes clogged or too dirty, it can prevent the engine from starting. To keep this from happening, replace paper filters—or clean or replace foam filters—after every 25 hours of engine use.
If the filter gets clogged, you will likely encounter issues with your lawnmower. This can be something as simple as an annoying sputter when you try to start the mower, difficulty getting it started, or it can cause the mower to idle unevenly.
One of the more common questions we get concerns either the overwhelming smell of gas coming from the carburetor or fuel leaking out of the bowl or overflow. Both conditions are typically caused by a stuck or worn float needle valve.
In many cases, what causes your car to spit out gas is in the fuel filler vent not ventilating the fuel. When the fuel is not properly ventilated, pressure may start to build in the gas tank. This pressure results in the car spitting to reduce the pressure in the tank when the fuel nozzle is removed.
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.
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.
Usually the problem is in the float bowl. The float needle and seat need replacing. When it`s faulty, gas doesn`t stop flooding the carburetor and gets into the cylinder and mixes with the oil. You must also change the oil when this happens as your oil is now ruined.
A clogged fuel filter causes low fuel pressure that results in a lean fuel condition and engine misfire. This can result in poor fuel mileage, rough idling and possibly cause the check engine light to come on. Once that light is on, it`s time for a trip to the repair shop.
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My petrol lwan mower won’t start! I have checked the spark plug and cleaned it, checked the air filter and have also cleaned it they are fine. I have also taken the carburettor to bits and have cleaned it and still no joy. It has a full tank of petrol and the oil is fresh also. I checked the air line and the petrol pipe and these are all ok. When i sprayed quick start into the air filter my lawn mower started up straight away. Then cut out once it had used it up. my throttle plate had also snapped which i fixed and my clutch cable had also come loose which i have tightened and is now fine. The lawn mower is only 3 years old and has not been used for 2 years as my neighbour just went out and brought a new one. so i am trying to get this one started as my electric one has just died on me. I have also been having a go at setting the carb today buy adjusting the air pin but still no joy. It is firing though but just wont start!!! can anyone else suggest anything that might be wrong. Also do these have chokes as i can not find one for it. MY LAWN MOWER IS A POWER DEVIL 3.5HP
When you sprayed the quick start into the thing and it started and ran out, I think the answer sits here you also said you pulled the carb apart to bits it is apparent to me you did not do a thorough job!! Just the fact that you stated that it has not been started for two years tells me that you are having petrol movement problems. For one thing to get started check all the little orifices associated with petrol movement this is surely where you will find your answer to get the machine running, I know this for a fact. You will receive joy just as soon as all your do diligence is finished. If you cannot find the choke on your machine you surely cannot buy one for it. Maybe this repair stuff is just not your thing, maybe as your neighbor before you, you should maybe go shopping and then you will achieve the full amount of joy you are in such desperate need for. Going from electric power to petrol power is a total different world. I think that now my answer to your question is almost as long as your question, so I will be stopping because my fingers are tired of all this typing, GO BLACK HAWKS! Good luck PAL
Wont start no ignition put new plug in and fuel filter
Flush gas tank, fill with fresh gas and Stabil. Replace air filter. Remove bowl from carb clean bowl and holes in bowl screw.
I have had a poulan pro 550 series push mower for almost 1 year at the end of the season last year the mower would start briefly and then stop. i have cleaned out the air filter and that did not help.the mower started, i made one revolution around the yard 3/4th of the way the mower quit. I then primed the mower it started then quit and now it will not start at all. Does anyone have any suggestions of what to do. Thanks
There is a little spring that works the carburetor arm. If that popped off then the mower will not run.
The machine runs for about one minute then dies. I believe it is a fuel filter problem. where is the fuel filter. I have replaced the air filter and spark plug, and cleaned what was accessible.
Most mowers do not have a fuel filter on them. The problem is usually within the carburetor and it usually needs a good cleaning. The tiny passage ways in there get clogged very easily and it needs to be disassembled and have a thorough cleaning. You can find several videos on youtube if you’re so inclined, but carburetors are not for the feint-hearted and are better left to a professional if you’re not savvy with such devices (most guys will do it for about $40 US.).
Where is oil drain plug on MTD mower – Mtd LAWN MOWER PART # 683-04163B FRAME Assembly:RIDER
If it isn’t on the bottom of the engine (above the blade) then you don’t have one. This is not that uncommon. When you need to drain the oil, FIRST- pull the spark plug wire off!!! Then remove the dip stick or filler plug and turn the unit upside down and drain the oil.
Lawn mower will start and run for 5 seconds and shut down
Will it stay running with your choke on? if so then clean your carb. if not then look for a blockage from tank to carb. ie fuel shut off, deteriorated fuel line. plugged filter etc
Why doesn’t the shifter on my 42″mtd mower not effect the trans?
If the tractor has a hydro-static transmission. There is a rod at the back to make tractor roll easy for pushing. Rod out for neutral.Rod in for drive ingaged.
Lawn mower cranck but wont start…
Since you already checked for spark and air I would drain all the fuel out of it and check that fuel for water. Over time some lawn mowers end up with contaminated fuel. You can see the water sitting on the bottom of the fuel if you let it stand for a bit in a small plastic bowl.
Be sure to empty and dry out you fuel can as well. Especially if the mower stopped running right after a refuel. Which is a good sign your gas can is contaminated too.