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11hp Briggs carb settings

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F12Tom

06-29-2000 16:10:03

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I just bought a used Dixon ZTR mower and am sure that the carb settings are off. (Mostly because I turned them all over the place-it does run better though). Does anyone have the factory specs for the various settings? Also, any advice on these machines would be much apprieciated.

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Bob (KY)

06-30-2000 09:33:37

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Re: 11hp Briggs carb settings in reply to F12Tom, 06-29-2000 16:10:03

Hey Tom. On most carbs you can initially set both the idle mix and the high speed needle adjusts at 1 1/2 turns out to get started and then make final adjusts after engine is warmed up. I just happen to have an older instruction manual for a 11 HP Briggs right here. It says:

- Turn needle valve (high speed) clockwise until it closes. Do not force, stop when screw closes. Now open needle valve 1 1/8 turns counterclockwise. This will permit engine to start and final adjustment can be made after engine warms up.

- FINAL ADJUSTMENT Place governor speed control in "FAST" position (that means open throttle all the way). Turn needle valve in clockwise until engine slows(lean). Then turn it out counterclockwise past the smooth operating point(rich). Now turn the needle valve to the midpoint between lean and rich. Next adjust the idle mixture. Rotate the throttle counterclockwise and hold against stop.Adjust idle speed adjusting screw to obtain 1750 RPM. Holding throttle against the stop turn idle valve in (lean) and out (rich). Set at mid point between lean and rich. Re-check idle RPM. Release throttle. If engine will not accelerate properly, the carburetor should be re-adjusted, usually to a slightly richer mixture.

Hope this helps!
Bob

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BIGD

09-11-2002 19:24:05

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Re: Re: 11hp Briggs carb settings in reply to Bob (KY), 06-30-2000 09:33:37

IF YOU HAVE DONE WHAT BOB SAID TO DO AND THAT DONT WORK IT TIME TO REBUILD THE CARB.

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