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2 horse briggs runs rough at top speed

Discussion in 'Mechanic and Repair' started by Robert Doubrava, Sep 1, 2001.

  1. Robert Doubrava

    Robert Doubrava LawnSite Senior Member
    Posts: 342

    the engine is a 2 hp briggs on an edger. when it runs at top speed, it backfires occasionally. what can i do to fix it?
     
  2. Robert Doubrava

    Robert Doubrava LawnSite Senior Member
    Posts: 342

    it is also hard to start hot.
     
  3. Robert Doubrava

    Robert Doubrava LawnSite Senior Member
    Posts: 342

    is it an air/fuel mixture problem?
     
  4. EJK2352

    EJK2352 LawnSite Bronze Member
    Posts: 1,150

    Try adjusting the high speed needle on the carburetor:) ED
     
  5. Robert Doubrava

    Robert Doubrava LawnSite Senior Member
    Posts: 342

    ok. thank you, ED
     
  6. khouse

    khouse LawnSite Bronze Member
    Posts: 1,465

    Robert,
    Are you working on some of these engines for others? I was just wondering because you've had a lot of problems at the same time on different units. It's not a problem and I like trying to figure out engine problems. I am curious.

    Doe's this engine run fine below full throttle and at idle. If it doe's then like mentioned above you probably have a high needle out of adjustment. Sounds like a lean missfire. Try going counter clockwise half a turn at a time. Sometimes the main jet gets clogged and you'll need to blow that out.
     
  7. Guido

    Guido LawnSite Silver Member
    Posts: 2,085

    Yup, there's your problem! I see most of your problems this week are with Briggs. Tell you something? :)

    I am curious too, is it that you've had these problems and not this site, or did they all come at once, or are they someone elses?
     
  8. Robert Doubrava

    Robert Doubrava LawnSite Senior Member
    Posts: 342

    well, all the engines are on my own equipment, except for the edger. i usually repair them with help from my dad, but i have been repairing the edger my self. some people think its weird that i do it myself, because i'm only 14!:) :D the engine sort of speeds up, then the RPMs go down like it is trying to "die", when it is running at an idle. also, the engine was made in 1969, and it still has the origional crankshaft, rod, piston, and carb.
     
  9. Guido

    Guido LawnSite Silver Member
    Posts: 2,085

    not on your edger!! ;)

    Good Luck man!!
     
  10. Robert Doubrava

    Robert Doubrava LawnSite Senior Member
    Posts: 342

    yep it should go in a museum,but my grandfather owns it.but i am going to ask him for it. :)
     

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