Briggs and Stratton Quatro

Discussion in 'General Questions' started by bikebum1975, May 20, 2009.

  1. bikebum1975

    bikebum1975 Member

    Hey Guys
    Figured someone on here may have an idea to this problem. It isn't on a motored bike but i have a lawn mower engine and it ran fine yesterday went to use it today started ok and was using it for a few minutes all of a sudden the engine started to hunt up and down the RPM range and almost stalled itself. It has a new plug the carb was cleaned recently not taken apart and has a new air filter on it. Any ideas as to what might cause this problem? Never had any issues with the mower till this came up today.
    Thanks for any help
    Jim
     

  2. darwin

    darwin Well-Known Member

    My 1st look would be at the carb, clean it thoroughly and make sure the linkage isnt binding at all. Look in the gas tank for debris just to cover that issue. A quattro has a float and bowl type carb I think and any debri will effect your motor as you describe. Make sure your choke is working to open and close all the way with the lever too....thats where I would start.
     
  3. s_beaudry

    s_beaudry Member

    Could also be a pinhole airleak in the gasline....

    I have been thru that problem more then a few times!
     
  4. darwin

    darwin Well-Known Member

    After reading your post again you need to take the carb apart and clean all the passage ways out and clean any residue out of it that might be sticking to the walls or bowl or needle, an air source will work wonders or wd40. I use a really fine wire to go through the passage ways then follow up with WD40.
     
  5. darwin

    darwin Well-Known Member

    True sbeaudry but he says nothing about leaking fuel, a hole in the fuel line would not make it rev up though I dont think, it would make it spit and sputter from sucking air instead of the fuel it needs.
     
  6. bikebum1975

    bikebum1975 Member

    Thanks much guys I am going to check out the carb figured you guys would be able to help I'll let ya know how I make out.
    Take care
    Jim
     
  7. bikebum1975

    bikebum1975 Member

    Darwin you are right there is no leaking fuel on it. However don't know about this issue when I did have it running after it started to run out of fuel it ran well for a few seconds have now idea why but will check everything out you suggested thanks again.
    Jim
     
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