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I have a Yardman 21 inch self propelled mulching mower Model 12A-559K401, with B&S Engine - Model 120602, Type 0131E1, Code 000509FA. Gas is fresh, air filter is clean, spark plug gap at .020". Engine will start (although sometimes with more pulls on the starter cord than it used to take), but will only run for 1-2 seconds before it just dies. It will restart, and then immediately die again after running for a second or two.

Posted by Anonymous on

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Posted on Jan 02, 2017

jj505
  • 195 Answers

SOURCE: Yard-Man Mower model 418D401 doesn't start

Need to remove carberator bowl nut and bowl and activate float to smell new gas coming thru,stuck mostlikey due to storage.

Please rate. Thanks. jj505

Posted on Mar 30, 2009

  • 109 Answers

SOURCE: poulan 21

Try putting a SMALL amount of gas in the carb and see if it will start, if it does, it is a fuel problem, if it does not it is probably an electrical one

Posted on Apr 26, 2009

  • 376 Answers

SOURCE: Hello I have a Craftsman eager 1 Lawn Mower model

The breather hose has nothing to do with it not starting. It starts when you prime the carb and dies when that gas is used up. Being a Tecumseh. it's most likely the bowl nut/jet stopped up. Unscrew the bowl nut and clean it. Look cery carefully at the top of the threads. There is probably a very small hole there also and it will not run if it is not open.

Posted on Jun 20, 2009

Testimonial: "Carb kit was on the money installed it on8/20/09 Started and Runs fine"

  • 1 Answer

SOURCE: Self-Propelled Model Starts, then dies after about 15 seconds

I posted same problem as this couple days ago. Took mower to shop. The governor spring (located just under the air filter) had come off. So glad it was something so minor!

Posted on Jul 25, 2009

  • 582 Answers

SOURCE: my toro 6.5 self propelled mulching mower with

IF THERE IS A PRIMER BULB ON THE CARB CHECK AND SEE IF IT IS HOLDING GAS IF NOT THE CHECK VALVE UNDER THE PRIMER IS BAD AND SUCKING AIR

Posted on Aug 12, 2009

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