Carb acting starnge after rebuild

Old 08-10-16, 05:46 AM
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Join Date: Aug 2002
Location: new york
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Carb acting starnge after rebuild

Hi All,

I have a 5hp Sears Craftsman snowblower with Tecumseh engine that is probably 30 years old. I figured I would clean/rebuild the carb as under load it started acting rough and stalling. Bought the rebuild kit, disassembled and soaked for a while and put back together. I have never done a rebuild before so first time. SO I got it all back together and did a rough adj. on screws. It is a float style so I adjusted main screw on bowl 1-1/2 turns out and the other I did 1 turn out. I stared the blower up and it appears to run and sound great at idle and when I put on high speed it also sounds nice a smooth. My question is on the choke. Prior to the rebuild ( and like other small engines I have) if I move the choke lever so it is all the way closed while starting, the engine starts and runs rough until you open the choke and then it smooths out. Now after rebuild I can start and it sounds greta however, when I move the choke all the way open or all the way closed, it has no affect on the engine ( still runs and sounds smooth) this is making me think something is not adjusted right or something. IF I look at the disk in the carb when I move the lever it is opening and closing the disk where the air enters. Any thoughts? Thx
Old 08-10-16, 08:25 AM
Join Date: May 2006
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If it starts and runs fine, don't worry about the choke. At low throttle set the screw on the side for max rpms. Then at full throttle, turn out the bowl screw until it loads slightly, then back in for a max, smooth rpm, then back out 1/8 of a turn. When you start blowing snow you may have to adjust the bowl screw slightly (probably out) to handle the load on the engine.

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