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briggs and stratton Push mower cant get running PLEASE HELP!!

Discussion in 'Mechanic and Repair' started by J.T.RLawnCare, Apr 19, 2012.

  1. J.T.RLawnCare

    J.T.RLawnCare LawnSite Member
    Messages: 21

    My push mower will start for 5-30 secs. and never gets to operating speed kinda sputters like its trying to start then dies out, i have good spark and just changed the carb nothing changed got it to sputter a little longer after the new carb and i cant find any holes in gas cap for vent any ideas? :confused:
     
  2. dutch1

    dutch1 LawnSite Silver Member
    from Jayhawk
    Messages: 2,248

  3. J.T.RLawnCare

    J.T.RLawnCare LawnSite Member
    Messages: 21

    125k02-0477e1-050105fb
     
  4. dutch1

    dutch1 LawnSite Silver Member
    from Jayhawk
    Messages: 2,248

    Under normal conditions, a non venting tank would not shut down an engine in 5-30 seconds.

    When you changed carbs, did you use a known good carb or a new one?

    Check the compression. If it's under 60 psi, suspect some valve problems.

    If the compression is good and you know you have a reliable carb, take a look at the crossover tube and the crossover tube gasket between the tube and the engine block. Over the last few years, I've discovered both conditions and either will cause the engine to suck excess air. Make sure the oring is present between the carb and the carb mounting bracket.

    Run your hand under the head--if it's dirty and oily, you may have a head gasket leak.

    Just a few thoughts--your mileage may vary.
     
  5. herler

    herler LawnSite Fanatic
    Messages: 5,139

    PCV rubber tube needs replacing.
     
  6. J.T.RLawnCare

    J.T.RLawnCare LawnSite Member
    Messages: 21

    took it to the shop needed a valve adjustment and a new flywheel key :clapping:
     

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