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Briggs throttle backs off

Discussion in 'Mechanic and Repair' started by jeffyr, Nov 10, 2002.

  1. jeffyr

    jeffyr LawnSite Senior Member
    Messages: 876

    Hi all,

    I have an 8 horse little wonder push blower with a briggs vanguard on it. It always starts and runs great, but when I rev it up to full throttle it slowly backs itself down to about halfway, unless I keep on top of the throttle lever. If I keep my hand on the throttle lever it is fine. Anyone know what's up with it ? I haven't recently changed anything on it (excluding the oil of course :rolleyes: )


  2. ksland

    ksland LawnSite Senior Member
    Messages: 927

    The throttle plate gets loose at the pivot point and vibration backs it off. Off the top of my head its Jerry Rig something or buy a new throttle plate
  3. wriken

    wriken LawnSite Silver Member
    Messages: 2,154

    My 16 hp on my 48" hydro did that when it was brand new, it would back down 2-400 rpm's. Then it quit doing it, I thought I would have to replace it. Now with well over 100 hrs on it it still stays wide open.
  4. Most of the throttle levers are kept in place with a rivet. Take apart and re-tighten rivet with punch and hammer.
    Or like ksland said replace part-just worn and vibration moves it. Probably around $10.
  5. jeffyr

    jeffyr LawnSite Senior Member
    Messages: 876

    Thanks for the help. I'll look into a new throttle plate.

  6. Tvov

    Tvov LawnSite Bronze Member
    from CT
    Messages: 1,157

    We've had that problem with a variety of makes and models of blowers. Our "high-tech" solution is simply to put a bungy cord on the throttle control to keep it revved up. I've tried tightening, re-bolting, re-riveting, etc. but the bungy cord has always worked and it quick and cheap!
  7. PR0 TURF

    PR0 TURF LawnSite Bronze Member
    Messages: 1,088

    We have 2 Little Wonder blowers (8 & 11hp) and have had that same problem for the past year or so with them. I brought them down to my mechanic to see what he thought. He knew what the problem was instantly. Down on the side of the motor where the throttle cable meets the carb you'll see a wing-nut in line with the throttle cable. All you have to do is tighten that & that will eliminate the backing off problem. Good luck
  8. jeffyr

    jeffyr LawnSite Senior Member
    Messages: 876


    I tried the wingnut, and it makes it better when it is tighter, but also makes the throttle cable too difficult to move. I will have to look further when things slow down. Maybe the friction washer on that wingut is worn ? I'll post if I find an easy fix.

    The throttle plate seems tight also.

  9. dfor

    dfor LawnSite Senior Member
    Messages: 828

    Same thing happens to my 8 hp Briggs Little Wonder blower. I use a bungy cord also.
  10. jeffyr

    jeffyr LawnSite Senior Member
    Messages: 876

    I am making use of the bungee for now. But this bugs me. My thatcher with a 5hp briggs does the same thing. :angry:


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