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6 HP Tecumseh Engine won't stay running

I have a Murray string trimmer with a 6 HP Tecumseh engine. I went to start the engine this week and it won't stay running. I have to prime it 12 - 14 times to even get it to crank, but then it only runs for a second and cuts off. I added Stabil to the gas before I stored it for the winter, but I went ahead and emptied the gas tank and carburator bowl, put in new gas, put in a new air filter and a new spark plug, J19LM. It still does the same thing...runs for a second and then cuts off. Any ideas? It has always been a little hard to start even when it was new.

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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

Posted on May 15, 2010

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