Question about Craftsman 25cc Gas Line Trimmer

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Trimmer starts immediately, then stops

Craftsman 25cc trimmer starts after priming with no problem. 2/3 minutes later stops. Won't restart. Starts few hours later no problem. Checked filter - OK. Lots gas. Gas lines look clean???? After reading your Terms, I perceive that there is no cost for this service.

Thanks for any help you can give me.

Wayne

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How old is the trimmer? If still under warranty, Sears can fix this. If not, then my experience has been the problem is a bad coil. This is due to heat build up. When the coil gets hot, it shorts out.

Posted on Dec 07, 2008

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1 Answer

Hi, I have a craftsman 25cc weed wreck. always starts in first time(cold) then couldn't start second time; If starts in first time, after 2-3 minutes (engine warms up) engine automatic stops.


the warmth to the carburetor will cause dirt to expand inside causing this to happen. Usually after 2 to 3 years these caburetors are no longer good to use. A new one will be better to have to run your trimmer
Walbro makes these caburetors and nobody likes to service them for their size is small and the cost is far cheaper to replace than fix

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does it have a fuel filter, or air? If it does make sure they are both clean and free of debris as priming will force fuel up line but will die as soon as its burned out

May 30, 2010 | Craftsman 25cc Gas Line Trimmer

1 Answer

Gas trimmer runs for a few seconds and then stops


Sounds like you will need to clean your carburetor.
Sometimes you can get by with priming it a few times, 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.
If the mower is over a couple years old, then I also 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.
When you clean your carburetor and remove the jet screws, count the
number of turns it takes to seat the jets from their original position.
That way when you go to put the jets back in, you know how many turns
they were in/out.
Please rate me, Thanks
Good Luck, I hope this helped

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2 Answers

Need gas line sketch for craftsman brush wacker 32.cc


Most 2 cycle engines are basically the same. The primer button has two lines coming from it. Gas is actually s.ucked thru the carb and not pushed thru when you prime it. Take a look at the sketch I provided and hopefully you will get yours running again.58fe8f0.jpg

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1 Answer

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Replace all of the lines before any adjustments, too small to see air leaks are a common cause the issue you have.

Feb 27, 2010 | Craftsman 25cc Gas Line Trimmer

1 Answer

Engine starts when I hand prime it,but not when I use prime bulb.


There are two screws on the carb. 1 is Lo rpm air/fuel ratio and the other is hi rpm. Try adjusting the lo rpm screw counter-clockwize a 1/2 turn at first, more if needed. After each adjustment try to start. The other thing you could check is if the float is sticking in the bottom of the carb. which shuts off gas flow if full. There is a screw on the bottom of the carb to drain that float. You can try that also! Good luck man!

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the rings are whorn out replace them.take compresstion test to see if compresstion is bad bet it is.let me know

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

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