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Primer button bowl brass bolt and plastic.

The bowl under primer button,took apart to clean not working well,already changed plug and air filter was told to check pin hole in brass bolt, was dirty but now cant get it to go back in,does plastic go into brass then into hole,or upside down with plastic on top of brass bolt.

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What is plastic ? all there should be is a bowl , then small round gasket , then brass nut . if it doesnt go on you must have disturbed the bowl gasket ( black round )

Posted on Oct 24, 2008

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I have a Toro 20462 power mower -- about 15 years old, but until just today still running great! The spark plug is good, the gas is good, the oil is good the air filter is good. After priming, it starts...


Remove and clean the brass bolt that holds the float bowl on the carburetor. Clean out the bowl too. Use no metal objects to clean this bolt. It has 3 small holes...bottom...and on the sides near the top. Use carb/choke aerosol spray cleaner on it. IT can clog (esp. without an inline fuel filter on mower). Clean the bolt good, reinstall (not forgettting felt gasket between IT and the bowl) and your runnability problem and fuel flow problem should be solved as the bolt is also the main jet of the carburetor.

Sep 11, 2011 | Toro Power Lawn Mower

1 Answer

Hi, I have a Craftsman Eager-1 5.3 3-in-0ne solid state enigine lawn mower..got it used but in almost new condition. worked great cutting 1 1/2 ft of very wet grass for a few hours (couldn't get to it...


Drain the fuel or when you remove the float bowl bolt (also the main jet), then hold up on the float to keep the needle on the seat so gas won't go everywhere. When you have that brass bowl bolt off, clean it! Use nothing metal on it. Pay close attention to the small hole in the bottom and along the smooth unthreaded part at the other end. Use carb/choke cleaner to blast gum and dirt out of those very small fuel orifices. I recommend installing an inline fuel filter also. A shut off valve is recommended too, that way if the needle in the carb sticks open, the crankcase won't be polluted with gas. Usual symptoms on a clogged lawn mower main jet though, are after pushing primer bulb, engine runs about 3 seconds. Try the brass bolt cleaning and post back if needed.

Jun 14, 2011 | Lawn Mowers

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HI there, I got a lawn mower mtd yard machine briggs ans stratton 4,5 hp, it start pretty well but won't stay running, I change the spark plug, oil, gas brand new, clean the carburator, clean the air...


There could well be a build up of sediment and debris in the main jet to the carburetor. It is easy to get to and clean. It is the brass bolt that holds the lower float bowl onto the main body of the carburetor. To clean it, drain your gas. Remove the bolt and external washer UNDER the carburetor bowl. Clean out the bowl of any sediment and/or water. To clean the brass bolt, use no metal objects. Carb/Choke aerosol spray cleaner will do the job. Pay close attention to the hole in the bottom of the bolt and the very small holes about 2/3 of the way up the bolt. Clean till shiny with holes cleared and reinstall. Your fuel flow problem and shut off condition may be solved.

Jun 05, 2011 | Mtd 22" Yard Machine Push Mower

1 Answer

I put new spark plug in and changed gas in lawn mower and now it won't start.


Your mower has to have these things all working in unison to start 1. Compression (the engine has to be in good shape) 2. Clean Air (Check Air Filter) 3. Clean,fresh constant fuel supply (Maybe remove bowl of carburetor and clean/check for debris and/or water). 4.Strong Spark (Remove Plug and ground the body against the engine. Pull starter and check for nice, blue spark.
Sometimes, the problem is as simple as the brass bolt that holds the bowl on the bottom of the carburetor is clogged and needs cleaning. That's because this dual purpose bolt is ALSO the main jet. So if you remove it to clean the float bowl, clean the bolt as well. Use no metal objects on it at all. There are small holes in bottom and along the sides that get gummed up when fuel dries.
Carb/Choke areosol spray cleaner will clean the bolt. Remember, don't scrape it up.
Check all these things. To maybe "coax" the engine to run, remove the spark plug and spray a couple of shots of carb cleaner into the engine. Immediately choke it and pull start.
Some OHV lawn mowers are difficult to start because the overhead valves need adjusting periodically. The Briggs and Stratton website have instructions and specifications for doing this. It is not real complicated and allows for easier starting and much better running. Post back if needed.

Jun 04, 2011 | Troy Bilt 5.5hp Self Propelled Mower

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I have a Sears (Craftsman) mower model # 944.368300. When I prime it, and attempt to start it, it runs for approximately 5 seconds and then dies. If I hold the primer button in, the mower keeps running. ...


Try removing the brass bolt that holds the float bowl to the carb on and cleaning it thoroughly. This bolt is the main jet for the carb and can become clogged with varnish or debris esp. if no inline filter is used or gas is allowed to evaporate in the carb. There will be small holes on the bottom and the sides where there are no threads. If no other problems, this should cure the 5 second run.
Please vote on this solution.

Sep 04, 2010 | Craftsman Air Filter 33021 2 pk for Lawn...

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The engine started then few minutes later died after cleaning the carburator,float bowl assy, air filter .and fuel lines re assembled the engine and fuel is leaking from air filter and primer


You may need to also thoroughly clean the small holes in the brass bolt that holds the carb bowl on...holes at botttom and across the middle where there are no threads. Don't use anything that will enlarge these holes as this bolt is also the main jet of the carburetor.

Jul 13, 2010 | Mtd 22" Yard Machine Push Mower

1 Answer

I Have a Craftsman 675 Series When I try to start the mower it will not keep running unless I keep pumping the primer button and then it will start are there any kind of carburater adjustments. What can I...


There is one thing fairly easy you can try. You take the aluminum bowl (bottom) off the carburetor. There will be a brass bolt with a washer holding it on. When you do this the carb will leak gas so you should drain the fuel first or stick something under the carb to collect it. There will also be a gasket between the bowl and carb body. Don't mess it up. The bowl should be cleaned and have no residue or dirt or water in it..the brass bolt is the big concern here though. Inspect it closely ...tiny holes in the smooth part above the threads...and bottom...make sure they are clear. Use carb cleaner Dont enlarge any of the holes...clean with toothpicks, no metal....this is the main jet to the carb. Try it.

Jun 07, 2010 | Craftsman 675 Series 190cc 22" Briggs ...

2 Answers

Won;t start


I got a new air filter for mine today, plus cleaned out the metal fuel canister under the carburator and the little brass bolt and my mower started right up. I was having hte same problems getting my mower to run and stay running. Glad I checked this site!

Sep 09, 2009 | Mtd 22" Yard Machine Push Mower

1 Answer

3 Hp Tecumseh lawn mower wont stay running?


Probably a carburetor problem. Old fuel, tiny amounts of water, plugged jets or a totally plugged air filter will cause that. Another option may be the throttle linkage is either unhooked or bent.
Remember to shut off the gas tank or empty it or plug the line before opening a carb or removing the carb.
Carb first, on the bottom is a float bowl held in place with a bolt that is hollow and is also a fuel jet. Remove the sediment(float) bowl and make sure it is clean, make sure the gasket on top is not damaged.Make sure the float moves freely up and down and the needle valve is not stuck. Make sure nothing is bent or shows rub marks on the float. Clean the needle valve and all orfices in the carb by spraying carb cleaner through them.The "bolt" that holds the float bowl is usually brass and hollow in the center with two tiny holes that are horizontal, if the center or the holes on the side get plugged - the engine will not run, it will only run until it uses up the gas that seeps into the center. Remove any gaskets first as carb cleaner will cause rubber to expand and get very soft. It is best to usually remove the carb to do a thorough cleaning.When every thing is clean reassemble and reinstall the carb. Clean the air filter thoroughly with some solvent or gasoline, and let it dry (foam filters) for paper filters, blow them clean from the inside using compressed air.
When all is back together, check to see the wire linkages are in their proper place and that they move freely.
Also ensure the choke is not on and that it works properly when it is started. Occasionally also this problem may be caused by a defective primer bulb if it has one. Usually if defective it will either leak or not work. Some are made with a tiny hole in the end, covering it will cause the engine to speed up.

Aug 30, 2009 | Mtd 22" Yard Machine Push Mower

1 Answer

Mower starts won't keep running


check the bowl under the primer button see if there is dirt in there watch how it comes apart,then send me email cant get mine back together,mine was dirty should help.

Sep 18, 2008 | Lawn Mowers

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