Engine woes

Discussion in 'Mechanic and Repair' started by JohnSmiles, May 25, 2008.

  1. JohnSmiles

    JohnSmiles LawnSite Member
    from INDIANA
    Posts: 1

    Got a problem here that is driving me nuts.
    I have a Briggs engine, model 190402, type 2643.
    Start's on the first pull and runs perfect.
    For about 5 minutes.
    Then dies.
    Restarts on first pull sometimes, but then dies again in a couple of minutes.
    Or sometimes wont restart for 10-20 minutes or so.

    I have replaced the coil, new plug, rebuilt the carb, replaced the fuel line and filter, and cleaned out the gas tank and refilled with new fuel, even changed the oil.
    Most of this was in desperation, as I ran out of idea's.
    This is on a rear tine tiller, and it just runs perfectly, but won't keep running more than a few minutes at a time, and after you restart it it a few times it won't start at all for 20 minutes or so.
    Any ideas? Am losing my mind here.
     
  2. mike green

    mike green LawnSite Member
    Posts: 17

    you need to do a compresion check you may be waisting your time
     
  3. Bill Kapaun

    Bill Kapaun LawnSite Senior Member
    Posts: 923

    Possibly the vent hole in the gas cap is plugged.
    Try loosening the gas cap for a few seconds and see if you get the "full" 5 minute run time.
     
  4. traderfjp

    traderfjp LawnSite Member
    Posts: 63

    I wonder if the valves need to be adjusted.
     
  5. StevieZ

    StevieZ LawnSite Member
    Posts: 104

    Most L Head briggs don't have adjustments.
     
  6. traderfjp

    traderfjp LawnSite Member
    Posts: 63

    That's good to know. Thanks. I'm getting rid of one after about 25 years. It has always started after 2 pulls even after sitting all winter. I'm going with a Honda motor now.
     
  7. mountainlake

    mountainlake LawnSite Member
    Posts: 33

    Do what Bill said, thats the most likely cause, of the other things mentioned why would it run 5 minutes? Unless you new coil is bad. Steve
     

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