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Lawnmower won't start.

Have taken apart carburetor and cleaned. Sprayed with carb cleaner, new fuel, all pipes cleaned, new spark plug, primer working fine, oil OK, filter fine. Working fine then one day just stopped. Any ideas why my sovereign 40cm petrol self propelled mower won't work. Running out of ideas. Feel my only option is landfill. Thanks

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  • 30 Answers

Blades blocked?

Posted on Apr 25, 2017


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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: poulan 21

Try putting a SMALL amount of gas in the carb and see if it will start, if it does, it is a fuel problem, if it does not it is probably an electrical one

Posted on Apr 26, 2009

  • 1 Answer

SOURCE: Troybilt self-propelled mower - model 556 won't start

pipe from carb to engine broken. couldn't tell until covers & fuel tank removed. also part of deck holding engine came apart on mine. due to excessive vibration???

Posted on Mar 16, 2010

  • 11 Answers

SOURCE: I have a Craftsman 42 in. 15.5 hp lawn tractor

check an see if the cabuerator is getting fuel and check make sure sparkplug is getting continous fire from the coil

Posted on Sep 13, 2010

  • 150 Answers

SOURCE: runs on starting fluid, not

Try spraying a little gas where you spray starter fluid. If it runs you may have to install diaphram kit. If it has a choke can get around primer not working.

Posted on Oct 01, 2010

eugbug
  • 479 Answers

SOURCE: I have a MTD push mower that won't start every

Have a look at these tips for troubleshooting starting problems with lawnmowers:

http://www.fixya.com/support/r9118692-lawnmower_not_starting


Hope this helps!

Posted on May 14, 2011

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New spark plug, fresh gas, clean air filter. Wont start.


take the fuel line off at the carburetor. if fuel is coming out then you have a plugged carburetor. take it off and apart. clean it really good with carburetor cleaner and put in a new needle and seat. it should run as good as new.

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Tiller will not start


Check first whether you are actually getting a spark. Remove the plug, re-attach the spark lead and place the body of the plug in contact with the engine block. If the engine has a cowling which makes this difficult, you can use a socket from a socket wrench set or something similar to bridge the gap. Alternatively get an assistant to hold the plug against the engine with a plastic clothes peg. Pull the cord and check the spark is ok. It may be easier to see it in the shade or indoors (Don't run an engine too long indoors).
Problems with 2-cycle engines are often due to fuel flow issues in the carburetor. If the engine has a primer, make sure it is sucking up fuel. Look inside the tank and check that gas runs out of the return line when the button is pressed (the line without the filter).
Clogged jets can cause problems. These can be cleaned with a carburetor cleaning aerosol.
The valve in the gas tank cap can become clogged with particles of dirt. Check this is clear.
For a pictorial guide to cleaning a carburetor on a 2-cycle engine (used on string trimmers, chain saws, hedge trimmers and some lawn mowers), see my guide at the link below
String Trimmer Won Work 2 Stroke Engine and Carburetor Troubleshooting

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Ryobi 410 mini tiller w/Walbro WT149A primer bulb won't prime. New bulb, new fuel lines, hooked up right, carb cleaned. Been sitting for several years.Runs when fuel is pumped into the fuel inlet.


hello sir, my machine will only start when pumping primmer bulb or squirting fluid in the carburetor than stops. the fuel line has broken off, in most small carburetors this is a ongoing problem.old fuel will crystallize when left in tank for a long time.plugging up ports, fuel lines, small screen in carburetor.fuel lines will dissolve clogging carb.this is why it will run when the choke is on creating a vacuum to where there is fuel forced in the carb to rum,also the gas will evaporate leaving the oil behind clogging up carb.the thing to do is remove carb. and clean out,replacing gaskets or fuel line if necessary.use carb cleaner to clean out carb.make sure to make note where fuel line go.the fuel filter broke off of fuel line letting debris get in carb plugging it up.the muffler is known to clog up a lot on these machines where they want run. the compression should be 60 to 120 lbs any thing below 60 is junk. when adjusting the carb screws turn in all the way than turnout 1 1/4 turns turn in slow until machine runs also you need to check for spark by removing plug and grounding against engine to check spark, ok.a new spark plug would be a good ideal too , if you are going to make these repairs use new fuel line and filter,hope this helps,any comments welcome,thank you, !!

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1 Answer

21A-121R900 Won't stay running


hello sir, my machine will only start when pumping primmer bulb or squirting fluid in the carburetor than stops. the fuel line has broken off, in most small carburetors this is a ongoing problem.old fuel will crystallize when left in tank for a long time.plugging up ports, fuel lines, small screen in carburetor.fuel lines will dissolve clogging carb.this is why it will run when the choke is on creating a vacuum to where there is fuel forced in the carb to rum,also the gas will evaporate leaving the oil behind clogging up carb.the thing to do is remove carb. and clean out,replacing gaskets or fuel line if necessary.use carb cleaner to clean out carb.make sure to make note where fuel line go.the fuel filter broke off of fuel line letting debris get in carb plugging it up.the muffler is known to clog up a lot on these machines where they want run. the compression should be 60 to 120 lbs any thing below 60 is junk. when adjusting the carb screws turn in all the way than turnout 1 1/4 turns turn in slow until machine runs also you need to check for spark by removing plug and grounding against engine to check spark, ok.a new spark plug would be a good ideal too , if you are going to make these repairs use new fuel line and filter,hope this helps,any comments welcome,thank you, ~~

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1 Answer

My Craftsman 17cc gas weed trimmer wouldn't start.


Hi There, Check the primer bulb for tare or pin holes. Replace it. Check and clean carb jet it maybe plugged with debree. Also check for spark which you didn't say. Replace with correct plug.
Note; Do not use strong cleaners on rubber seals (O rings and gaskets) They dry up and crack.
If needed use a dabble of grease on seals

Jun 13, 2011 | Craftsman Garden

1 Answer

Weedeater PE550 will not stay on. Prior to placing this unit in long-term storage, the unit worked. Since pulling it out for this season, it would not start. I replaced the fuel lines and primer bulb. ...


Is the smoke coming from the spark plug hole or just near it?

There are three things that you need for it to work.

Fuel, air and spark.

If you are missing any one of those things, or if one isn't optimal, it wont work well if at all.

You say spraying carb cleaner into the chamber lets it start, but after a minute it dies?

That tells me you are getting a spark.

Have you taken the carburetor out and cleaned it thoroughly with carb cleaner?

Often when fuel sits around inside a carburetor it can build up gunk and make it not function properly. I recommend removing the carburetor and taking it completely apart, cleaning everything with carb cleaner and putting it back together. It sounds difficult, but I promise it is not, just take pictures to help you remember how everything goes together if you want.

Also while you are at it either clean or replace the the air filter, that should help as well. If its a foam filter you can clean it with gas, if its paper, just buy a new one.

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1 Answer

2008 mtd lawnmower tries to start when sprayed with carb cleaner but stops after 3 seconds


If the spark plug is in great condition, remove and clean the carburetor. This will require soaking if needed with a good solvent or carb cleaner and compressed air to blow out the tiny passages that are clogged for the idle jet circuit and high speed circuit.

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1 Answer

My Coleman 5000 generator in storage. Gas tank was drained. New gas put in. Won't start. Gas poured down spark plug hole. l Engine will start but stops and won't start again. Is it a carburetor...


It sounds like your carb needs to be taken apart and cleaned out. The gasoline in the carb sounds like it has varnished and blocked the passages in the carb. I would try some carb cleaner, if you are comfortable in taking apart the carb, you can use the spray cleaner to open the passages. You might have to soak the carb a bit as well.

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Sounds like you need to take the carb. apart and clean it. I like to use a Den Tek Brush, (used for cleaning teeth), to clean the small ports in carb. they work great for this job. Make sure to either clean or replace the small screen in thcarb. as well.

Jim

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