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Lawn mower has fuel and bowl is filled with fuel, when you prime the mower no fuel is feeding into carburator

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Remove the bolt that holds the bowl on the carb and clean ALL the tiny holes in the bottom and sides of that bolt. Don't scrape on it and don't run metal drill bits or wires thru it. It is the carb's main jet and a good dose of carb cleaner spray should clear it.

Posted on Aug 29, 2010


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Mastercraft 4hp sat along time cleaned carburator and installed kit... still wont start

threw jets if the carb was stored with old fuel the jets could be plugged up as well as the needle valve can be stuck

Jul 03, 2012 | Garden


Lawn Mower Doesn't Start after Being Garaged


You find the weather getting nice and warm and see the new blades of green grass poking out from the ground after a hard long and cold winter.
Just then it strikes you, the lawn mower must come out of what we call, "moth balls", because very soon you will be needing it to cut the grass.So off you go to the garage or shed and pull out the mower that was put away at the end of last summer.
To your dismay after checking and filling the gas tank with regular gas and checking it's oil level, you prime the carburator and make the first attempt to pull that chord to start it.
No luck, so you pull it at least twenty more times priming the primer ball with your finger etc, it still wont start whether it be a self propelled Toro or Sears Craftsmen, it does not want to start, what do you do?
Well at first you think perhaps i'll take it to the lawn mower repair shop, but then you think, man the last time I brought my mower over to them it cost me more to fix it then it did to buy a new one.
I have been there and done all that folks and that is why i am writing this helpful tip for you in hopes to keep the money in your pocket rather then in someone elses.
First step you need to do is buy a can of starting fluid at any auto parts store, be certain you have on hand fresh 87 octane fuel at least three gallons for your lawn cutting experience throughout the summer months, a pair of pliers and a straight bladed and a phillips head(cross) screw driver approx 6" long and a can of carburator cleaner.
next tip, you remove the lawn mowers air filter most just twist and turn off(the ones that are shaped like a round mesh 2" diameter dowel), or the type that require a screw to be turned off to remove the flat shaped filter cover either one, once off spray a bit of starter fluid in the carb. opening and try to start it.
If itb starts run the mower and use it until all the fuel level drops then add more.
the mower should be good to use.
If the starting fluid doesn't start the mower, 99.9% of the time you have old stale fuel, reach under the carburator and locate the 3/8" black fuel line and unclip it letting the gas drain from the system into a flat pan, most times you need to remove the air filter cover to help gain access to the fuel line, next very carefully abserve the very bottom of the carburator, notice a round metalic bowl attached to its base by a nut approx. 3/8" or 7/16" hex size? Mark the outside edge of the bowl because the next step is you are going to remove that bolt holding the bowl and drain out the fuel and possible dirt that is lodged in it, carefully spray a stream of carb. cleaner into any of the tiny openings in the carb doing it gently as not to disturb any operation parts such as the float and the needle and seat that can come apart if you are not careful holding it. Be aware to have protective eye wear, also being careful not to disturb the rubber "o ring" gasket that seals the bowl at the top.
Put everything back together and refill the tank with fresh fuel, opay attentetion to the bowl marking you put on it before you removed it, should face out and centered, so you dont install it on the wrong position.
Fuel line tigh and clamped,air filter housing on after a little spray starting fluid, primer the ball at least five pushes, pull the cord, Walla, it runs like new!!
Happy Lawn Mowing!!

on Jun 10, 2010 | Garden

1 Answer

After priming engine stops after about 10 seconds Toro 22 in recycler model 20070

Your lawn mower is not meant to be run on fuel that contains ethanol. To fix your problem you have to remove the carburator and take it apart,get some carburetor cleaner the one with the plastic tube for spraying with pressure work over a small bowl or container spray the carburator through all of its ports and openings clean the carburetor till there is no build up ( build up usually apperars as discoloration on the metal then pour some carb cleaner into the container and let it soak. after soaking over night put the carburetor back together and reinstall with new gaskets as the ones that go to the block are usually hard and will tear just enought to let air in after putting together add a fuel additive to your gas they sell it at any Home and Garden store this will keep the ethanol from turning to gum again. When putting the lawn mower up for the season drain the fuel system or add extra additive to the fuel and prime it through the carb. This will solve your problems ,just make sure that you keep track of the way the diaghrams come out of the carb and put them back in the same order

Oct 03, 2011 | Toro Power Lawn Mower

1 Answer

Ran out of petrol put fresh petrol in and now it wont start

I think that your fresh fuel was full of water. I have heard that gas is usually good for about 30 days. The biggest problem is not the gas but the condensation in a gas can that is slowly getting emptied. This condensation builds up on the side of the gas can and drips down and into the gas. Pyshics makes water heavier than gas so the water will always be at the bottom, same in your mower tank, same in your mower fuel bowl.
Get a clear container and remove fuel line from the carburator, empty the fuel tank completely. Remove the bowl off the bottom of your carburator CAREFULLY so as not to damage the round gasket. Empty and wipe the bowl. Replace the clean bowl, fill with fresh gas and you will be able to proceed again. Before I wish you luck, look at the fuel you emptied into the clear container. If you see something at the bottom of all that gas, that would be your water problem. I hope this will help, GOOD LUCK.

Jul 13, 2011 | Garden

1 Answer

Not getting fuel to carburator have fuel and good filter have a solinoid on carburator bowl that is very hot could this be the problem

yes it is called a rollover valve so if machine rolles over it shuts fuel off preventing fire, remove bowl and clean it out and spray p.b. blast on the solenoid needle and keep working it till it moves free with the electricity from the batt should cure problem

Apr 05, 2011 | Toro 52" 27hp Z Master Zero Turn Lawn...

1 Answer

Will not prime, will run if i feed it gas but quickly shuts off

Take the fuel bowl off and clean the bowl as well as the needle valve where the little jets are. That most likely is your problem. The bowl is held on with a small bolt looking thing and the little jets are also in that bolt. Those little jets must be clear.

Oct 22, 2010 | Briggs & Stratton Lawn-Boy Insight Series...

1 Answer

Murray Walk behind mower, Model # 20705X6M 5.5 Briggs & \St not getting gas, I have torn the carburator of three times replaced gasgets needle valve cleaned all ports throughly, checked passage of gas...

Clean ALL the very small holes in the brass bolt that holds the carb bowl on.Some are VERY small and easily clogged. With bowl off and the bowl float hanging free, does gas readily flow? It should, and it should of course stop when the float is raised (putting the needle valve on its seat). If this event is occuring, then the main jet must be badly clogged. If no gas even gets into the bow. (not enough details).. then there is a vacuum lock or something strange going on in the fuel tank (cap). The threads of the fuel cap on a mower allow it to vent, preventing vacuum lock of the fuel flow.Start at the tank and go back in. Please repost as this is a good one.

Aug 17, 2010 | Briggs & Stratton Lawn-Boy Insight Series...

2 Answers

I can start the lawn mower but it will stall if I press the primer button it will stay going....when it warms up I can get it to run but if I start to mow it will stall

First thing I would check is the air filter. Then the belt that drives the wheels. Open up the belt area and clean. Last I would check the carb. Good luck...Lee

May 28, 2010 | Mtd Yard - Man 160cc, 21" Self - Propelled...

1 Answer

I have a scotts model 22965x8a lawn mower that conks out soon after starting. I have replaced the spark plug and cleaned the fuel lines but the problem persists. Any ideas for troubleshooting since I do...

Sounds to me like it is fuel related have you cleaned the carburator and Bowl ?
If not I would try removing the float bowl bolt located under the carburator .
these bolts are hollow and fill up with dirt and sediment once removed you will see small holes drilled into the side i use a torch tip cleaner but a straight pin will work to unclog .clean any debree from inside of bolt before installing i use spray carb cleaner with the extension will get into the holes well .I would always try this first before assuming the carburator needed to be taken apart and cleaned hope this helps .

May 21, 2010 | Garden

1 Answer

Mowers is not getting gas

Check your float ... it might be sticking in the upward position when the fuel well fully fills? This would cause the mower to run on the fuel that gets inside the line when you prime it, but since the float stuck in the upward position would close the intake line from the gas tank, your mower would die after the priming fuel is spent.
[The float is located inside the metal bowl beneath the carburator usually, and can be opened by removing a single bolt/screw in the center of the bottom of the bowl. Be careful to pay attention to how the valve-pin attached to the float is attached; usually it's just hooked on very loosely. Thouroughly clean the float, pin & inside of the bowl, then reassemble after making sure the float moves freely.] If the problem isn't solved by this, you might have an obstruction (like a leaf-cutter wasp nest) in your fuel line between the gas tank & carburator? Check the float first.

Apr 11, 2009 | Mtd 22" Yard Machine Push Mower

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