New B&S surges at idle

Discussion in 'Shop Talk' started by TNHermit, Dec 11, 2006.

  1. TNHermit

    TNHermit Well-Known Member Supporter

    Jul 14, 2005
    East Tenn.
    I have two B&S engines on two different machines A 5hp on y tiller and 8hp on my air compressor And an older 11 hp on an old lawn sweep. Anyhow the newer ones have both decided to surge when at idle. I've cleaned the filters and wanted to try and adjust the carbs. They seem to be running lean. Being old and not seeing that well I can find the adjustment screws on the carbs. I'm pretty sure the 5hp doesnt have any at all. SO what do I look for or whats the solution. They appear to be running lean at idle. The older 11hp has a down draft carb I'd like to replace but with what??
  2. moopups

    moopups In Remembrance

    May 12, 2002
    In beautiful downtown Sticks, near Belleview, Fl.
    Sounding like an out of adjustment governor or an air leak, not sure which with not enough info. In years past the air flow from the flywheel caused governor changes, not sure what does that action now.