Question about Briggs & Stratton Briggs Stratton Intek V - Twin Vertical Ohv Engine with Electric Start 22 Hp, 1" X 3 5/32" Shaft, ModelNo. 44K777 - 0027 - E1

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I have a Briggs and STatton 24 OHV intek motor on a craftsman lawn tractor. I got it on sale and when I got home it ran rough. The fuel line had collapsed or was plugged with some white powder. I took off the gas tank and it had at least a halfcup of some residue. I cleaned everything changed all filters and oil ,new plugs and it runs pretty good. The problem is I have to run it with the choke open. Sometimes half way out sometimes more. At idle it will mildly backfire. I have run different gas from differnt sources with no changes. What is wrong?

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It sounds like the fuel mixture is running very Lean..There are usually two adjusting screw screws on the carburettor that control the mixture. A Larger one is for the Main Jet and a smaller one for the Idle Jet. There is also an adjusting screw on the throttle butterfly to control the idle speed.
To adjust setup, start with at least a half tank of fuel, and have engine at operating tempurature (That is warm but not overly Hot). As a starting point, loosen (anticlockwise) Main Jet screw about half a turn, to richen mixture,so that engine will run without choke. Run engine at full speed and adjust main jet for highest smooth speed without engine missing due to mixture being too lean or rich.
Allow engine to idle and the adjust Idle Jet Screw for smoothest idle. Idle Speed screw may have to be adjusted if idle speed is too high/low.
Sequence above may have to be repeated to get best running. If engine hesitates sometime when sudden load is applied but then picks up, try adjusting Main Jet by 1/8 to 1/4 turn richer until it handles the load without faltering.

Posted on Aug 23, 2010

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