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The primer bulb not working on a craftsman weedwacker why?

When i press the primer bulb 8 time still no fuel come into the bulb i check the bulb it is good don't see no hold in it the fuel filter is good what i need to check to fix the problem?

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  • Craftsman Master
  • 24,493 Answers

There isnt supposed to be a hole in it. press it at least 8 times

Posted on Mar 23, 2019

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6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: Craftsman weedwacker won't start

When the Craftsman Weedwacker starts in idle and then stalls and the primer bulb will not fill with gasoline or will not pop back after being pushed in, then you have a blockage within the carburetor. The bulb is intended to **** fuel into the supply line, to prime it. To solve the problem, remove the carburetor, open the side that has ONE screw holding it (not the side with four small screws), remove all the two lines remembering how they were attached (the feeder line from the fuel tank attaches to the straight copper tube and the tube going to the bulb intake side attaches to the bent copper tube) and blow out the material blocking the fuel flow inside the carburetor. Then after replacing the carburetor, press the bulb and it should **** and discharge fuel easly. I have had two of these and the fuel path within the carburetor clogs easly. Jim Hart

Posted on Jun 05, 2009

dropndeal
  • 2931 Answers

SOURCE: primer bulb only holds suction, wont move fuel thru line

By "holds suction" this means that you can depress the primer bulb and it remains in the "pressed" position and/or does not reinflate (for lack of a better term)?

You need to determine if a blockage exists in either one of the fuel lines, or with the primer bulb itself.

First, drain your fuel tank. Do this into a clear mason jar or equivalent and inspect your fuel to see if it is full of debris since even very small pieces of grass, dust, dirt, etc... can cause problems. If so, then you need to flush your fuel tank and or lines.

Viewing the backside of the primer bulb, you can see several clear fuel tubing lines that lead from the primer to the carbureator and fuel tank..

Next, carefully remove these using a pair of needle nosed pliers (or by hand is at all possible) being very careful not to crush or tear the tubing.

With the clear tubing removed, if the primer bulb will press in and immediately reinflates back to it's relaxed position, then one or more of your lines are clogged by a small piece of debris. If the primer still does not relax, then it is blocked by a small piece of debris or needs to be replaced (pick one up at Lowes, etc...).

If you determine that your lines may be clogged, then I have had success clearing them with a can of WD-40 by sticking the red nozzle into the clear tubing (attempt to make a seal) and by pressing for a half-second or so. If you get flow, then let it rip for a second, then proceed to rinse your fuel tank again just for good measure (basically until you get nothing but clean gas...no debris).

Put it all back together and let it rip!

Posted on Jul 19, 2009

  • 1 Answer

SOURCE: Craftsman gas 25cc weedwacker starts, runs a few secs, then dies

The gas take up line is disconnected or is broken. I have the same problem and need to find a diagram to fux it.

Posted on Aug 28, 2009

  • 2239 Answers

SOURCE: Walbro WT891 carb on a

Who connected these hoses? the normal routing for a machine with a primer is like this, the fuel hose from the tank with the filter on the end goes to the carb fuel inlet nozzel ( not to the primer ) nearest to the pump cover ( cover on carb held with one screw ) the pipe from the metering side of the carb connects to the shorter nozzel on the primer bulb ( suction side ), the longer nozzel on the primer ( pressure side ) connects to the pipe going back to the tank, just remember the primer pulls fuel from the carb,into the bulb, and pushes it back into the tank, it is not actually a primer it is a purge. because it is connected this way it is impossible to flood the engine no matter how many times the bulb is pressed.
Let me know if it starts and runs.

Posted on Jan 31, 2011

hunter19_46m
  • 7482 Answers

SOURCE: Fuel does not reach carburetor

Hi twofoxes...
The fuel filter is located inside the fuel tank if you have one, but that may not be your whole problem. I will give you some extra info just incase it is not your fuel filter causing the problem.
The following info will help you thru the rebuilding of your carburetor just incase and some other things to check.
-------------------------------------------------------------------------------------------------------------------------------------------
Make sure you are getting spark at the spark plug, to do this:
Remove your spark plug and check to be sure you are getting fire at the spark plug.
You do this by grounding the plug on the head of the engine and pulling the crank rope, if you are getting spark then:
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: 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 mower or weedeater with the oil to the right mixture and not too much oil as it can cause hard starting.
If the weedeater 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.
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.
Once you have your carburetor rebuilt that should solve your problem.
This is a FREE answer,Please take time to rate me

Posted on Jul 03, 2011

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