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  1. #11
    Edwards saw service's Avatar
    Join Date
    Jul 2011
    Posts
    74
    Location
    Pennsylvania
    Mower
    John Deere

    Quote Originally Posted by archcycle
    I'm not sure if the spring gets taut when I start it but it is definitely loose when the motor is at rest. Should it be taut at rest? If so it has plenty of length in the straightened parts to adjust it.
    Yes the spring should always be taught at rest.

    Edwards Saw Service in Glen Mills PA

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  3. #12

    Join Date
    Sep 2011
    Posts
    7
    Location
    Florida
    Mower
    MTD - Yard Machines

    Re: B&S 500 series motor won't stay running

    The bottom of the gas tank was Very varnished so I soaked that for a while. Cleaned more, blew out with more air, reassembled, and it fired right up on the first pull!

    Thanks a lot for the help

  4. #13
    Edwards saw service's Avatar
    Join Date
    Jul 2011
    Posts
    74
    Location
    Pennsylvania
    Mower
    John Deere

    No problem. When I first became a mechanic lawn mowers were a pain for me to work on because I specialize in two cycle equipment but once you get used to working on them all day you get the hang of it. Glad I could help.

    Edwards Saw Service in Glen Mills PA

  5. #14

    Join Date
    Mar 2012
    Posts
    1
    Location
    North Carolina
    Mower
    I Don't Own a Mower :(

    Re: B&S 500 series motor won't stay running

    I have the exact same issue, but the mower is just a year old, probably only run 20 times. I took it apart and the diaphram and gasket looked perfect. If you wish the primer bulb after it starts, then it will stay running for 1-2 seconds after each press.... Sounds like the fuel isn't being picked up, but all looks good. Any ideas?

  6. #15

    Join Date
    Dec 2011
    Posts
    170
    Location
    Minnesota
    Mower
    Snapper, Cub Cadet, Wheel Horse, Allis chalmers

    Re: B&S 500 series motor won't stay running

    Quote Originally Posted by awojton View Post
    I have the exact same issue, but the mower is just a year old, probably only run 20 times. I took it apart and the diaphram and gasket looked perfect. If you wish the primer bulb after it starts, then it will stay running for 1-2 seconds after each press.... Sounds like the fuel isn't being picked up, but all looks good. Any ideas?
    check for any uneven surfaces betwen the 2 peices. also make sure that when you put it back together that the screws equally tight. if not, you can be pulling air from around any point where they come together. also take the rubber piece and with a bright light behind it check for the possibility of a pin hole

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