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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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Hi their. i have a kubota na 600 generator. the problem is there's is no fuel getting into the cylinder. there is fuel in the carb bowl and if i put fuel down the cylinder head via the spark plug hole

When you say you took carb apart did you put a new rebuild kit in it? If not there is your problem. The fuel eats over time the seals an they leak. There is only one fix to rebuild it or get a new carb. These kits are very cheap an easy to do. Just make sure you clean out all the orifices with something like a brass or steel bristle from a brush. Being careful not to enlarge the holes. When you remove the bowl on the carb if it has one. Be sure not to lose the springs an clean out the jets under the float. The kit for each engine is different. Use all the parts, dont skimp thinking this one is ok. Be sure to replace fuel lines at this time they get holes an cracks on them an cause all sorts of problems. This is an easy job. Your engine is sucking air, not fuel. Be sure to check to make sure passage to the engine is not clogges with somthing.

Mar 30, 2014 | Electrical Supplies

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I have a craftsman 6.5 hp push mower that was givin to me i took the carb off and sprayed it with cleaner and put it back on and it ran for a few mins then the next day it wouldnt start what did i do...

Remove and clean the brass bolt that holds the bowl on the carburetor. It has about 3 holes, 2 near top and one in the bottom. Clean it with the carb/choke cleaner. Don't scrape it or force metal through the holes. Clean bowl, spray some cleaner up above where the brass bolt screws into the carb body and reinstall.

Sep 13, 2011 | Craftsman Garden

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Engine starts, but stalls a few minutes later. Put new oil in. Bottom of mower is clear.

The carb is probably dirty and ingesting debris or water from the bowl into the main jet at different times. First, I recommend installing an inline fuel filter on it. Drain the old gas. Remove the bottom bowl on the carburetor and check for debris/water and clean it . Also be SURE to clean the brass bolt that held the bowl on the carb as it functions as the main jet of the carb. Clean the bottom hole and the holes on the sides near the top.Reinstall, not forgetting the felt washer that goes between the head of the bolt and the bottom of the bowl (on the outside of course). Use nothing metal to clean the brass bolt. Add fuel sytem cleaner (I like Chem Tool's berryman B-12) to your fuel can to aid in cleaning the inside of your carburetor. Make sure your spark plug is clean (brown, not black) and the air filter is clear. Post back if needed.

Aug 13, 2011 | Garden

1 Answer

Hi, I have a Craftsman Eager-1 5.3 3-in-0ne solid state enigine lawn 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 | Garden

2 Answers

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

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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

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

2 Answers

The toro will start and run for 2 seconds then quit. We took apart the air filter and cleaned the gas line as well as cleaned the plug. No improvement. Thought it may have been bad gas or a plugged gas...

I am not sure what type of carb you have so I will give you a couple of ideas.
1. If the carb is one of the plastic ones that attaches directly to the gas tank take of the air cleaner and press the primer bulb. If you get a spurt of gas and not a stream of gas get a new diaphragm for the carb. It goes between the tank and the carb.
2. If there is a sediment bulb hooked to the carb drain the gas from tank and then carefully remove the sediment bulb and clean it.
3. If there is a sediment bulb hooked to the carb and a flat paper air filter attached to the sediment bulb via a plastic air filter holder with a primer bulb built into the air filter holder replace the gasket between filter cover and sediment bulb.

good luck
let me know if this works.

Aug 12, 2009 | Toro Lawn Mower With Toro Power Tools

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