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Stihl weed eater

Runs good for a little while and cuts off,and won't start. the next day you can do it all over again

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  • Stihl Master
  • 1,807 Answers

Check the fuel tank vent and primer bubble if it has them. Check they function correctly. Vaccum could be created in the fuel tank while in use, starving the engine of fuel. Use it till it cuts out, then try removing the fuel cap and put it back on and then see if it starts again.

Posted on Apr 30, 2013

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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hunter19_46m
  • 7482 Answers

SOURCE: stihl weed eater runs for

Hi
Sounds like you have dirt/debris in your caburetor jets,fuel passages or a diaphgram that is becoming non-flexible.
Check/Clean/Replace your Air Filter, a dirty air filter can make your engine run to rich with fuel.
Note: ALWAYS USE COMPRESSED AIR TO CLEAN YOUR JETS AND PASSAGES, VERY IMPORTANT.
Note:Before you disassemble the carburetor:
Mark each piece with a awl, or some kind of instrument that will make an alignment scratch before you disassemble the carburetor into separate pieces.
That way you will know which way it goes back together when you reassemble it.
Sometimes you can get by with priming the carburetor or by using starting fluid and letting it run a few times like that, and it will flush the gunk out of the jets,but most of the time you will need to rebuild the carburetor.
Be sure to check your fuel tank for water and dirt/debris, if there is water/debris then you need to clean your tank.
Check you fuel line condition after a while they will degrade and need replacment.
Check/Clean/Replace your fuel filter if you have one, normally they are located in the fuel tank of weedeaters.
When you remove your fuel lines from the carburetor be sure to make a drawing to how the lines are connected to the carburetor.
Normally the big line will be the line the fuel filter is connected to inside of the tank.The smaller of the two lines is the return to the fuel tank from the carburetor after it is pumped thru the carburetor by the primer bulb.
Make sure you are using fresh fuel...and oil mix if your using a two cycle weedeater with the oil to the right mixture and not too much oil as it can cause hard starting.
If the trimmer is over a couple of years old, then I recommend that you buy and install a new carburetor repair kit,because the diaphragm will get hard and that will cause it to be hard to crank.
The diaphgram may look good and flexible, but it can be deceiving and not act as a fuel pump as it should because it has become too hard and will cause hard starting,start and run and shut off, etc.
When you clean your carburetor, I recommend that you use a laquer thinner type cleaner to clean and dissolve the laquer build-up in the float and needle jet passages.
Be sure to remove all plastic and rubber parts before using the laquer thinner because it can dissolve the plastic parts and render them unuseable.
Be sure to use COMPRESSED AIR to blow out all the fuel and air passages.The higher air pressure is needed to blow some of the trash/debris from the fuel or air passages.
Be careful when blowing out the passages, because there are sometimes small rubber type seats in the bottom of some of the passages.
Keep in mind that the float (if you have one) for the carburetor must be level when you go to reassemble the carburetor or follow the instructions you get with the carburetor kit, or you could also ask the parts man that you get your kit from.
When you clean your carburetor and remove the jet screws, you will first need to lightly seat the jet screws.
But before you lightly seat the jet screws count the number of turns it takes to seat the jet screws from their original position.
Be sure to mark the turns down on a piece of paper.
That way when you put the jets back in, you know to lightly seat them first and then turn them back out to their original position before you started.
Note:
The little spring inside of the carburetor goes under the float arm.
That is where your fuel inlet needle/float valve is located...on the arm at the end.
Normally there is a small indetion in the carburetor base and a small protrusion on the underneath of the float arm where the spring will be in the right postion for installation.
The spring will set in the indention and you will install the float arm with the needle/float valve and float rod into position over top of the spring,you will push down until it is in position and then you can tighten the screw that holds the float arm assembly in position.
Once you have your carburetor cleaned/rebuilt that should solve your problem.
Please take time to rate me

Posted on Aug 24, 2011

#1 Taper
  • 1040 Answers

SOURCE: weed eater starts, runs 5 min. then cuts off

The gas cap may be clogged.

The next time you run the trimmer and it starts to die, loosen the gas cap. If it starts running again, then you know that it's a clogged gas cap.

You may also check the air breather, it may be dirty as well.

Just let me know if you need further assistance.

Jim

Posted on Jun 28, 2009

pumpkinman
  • 1144 Answers

SOURCE: How do i replace a rewind spring in a stihl fs 45 weed eater

you have to kake sure u wind it the rite way there should be tension on the spring when it is wound and if let go should return if it does that u have it rite...the little plastic peice must be connected to the hooh on the spring

Posted on Jul 25, 2009

  • 53 Answers

SOURCE: weed eater bogs down

Under what conditions does it bog down? When it just idles? Cold or hot? When you give it gas? When you try to cut?

Posted on May 11, 2010

hunter19_46m
  • 7482 Answers

SOURCE: I have a RYOBI weed eater model ss30. I can get

Check your fuel filter in the fuel tank,if you have one it may need cleaning or replacement.
If the mower/weedeater is over a year old, then I recommend that you buy
and install a new carburetor repair kit,because the diaphragm will get hard
and that will cause it to be hard to crank.
Sounds like you will need to clean the carburetor or replace your carburetor
internal rubber parts like the diaphgram and O rings.
Be sure to use compressed air to blow out all the fuel and air passages.
Be careful when blowing out the passages, because there are sometimes small
rubber type seats in the bottom of some of the passages.
Sometimes you can get by with priming the carburetor or using starting fluid
and letting it run a few times like that and it will flush the gunk out of
the jets,but most of the time you will need to rebuild the carburetor.
Keep in mind that the float for the carburetor must be level when you go to
reassemble the carburetor or follow the instructions you get with the
carburetor kit.
When you clean your carburetor and remove the jet screws, you will first need
to lightly seat the jet screws.
But before you lightly seat the jet screws count the number of turns it takes
to seat the jet screws from their original position.
Be sure to mark the turns down on a piece of paper.
That way when you put the jets back in, you know to lightly seat them first
and then turn them back out to their orginal position before you started.
This is a FREE answer,Please rate me

Posted on Dec 23, 2010

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The gas cap may be clogged.

The next time you run the trimmer and it starts to die, loosen the gas cap. If it starts running again, then you know that it's a clogged gas cap.

You may also check the air breather, it may be dirty as well.

Just let me know if you need further assistance.

Jim

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