Brigg & Stratton Engine Stalls w/new carb

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  #1  
Old 05-17-08, 07:26 PM
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Brigg & Stratton Engine Stalls w/new carb

I have a Bowlens push mower with a 4.5 HP Briggs & Stratton engine. It will start when primed but will stop when the primer gas is spent. I installed a new carb from Briggs & Stratton, spark plug, gas cap, and air filter but the result is the same - runs until the primer fuel is spent. I also cleaned out the tank and used new gas on the refill. What else can I do?

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  #2  
Old 05-17-08, 09:45 PM
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Briggs Carb
You need to install a new diaphram kit, it is Briggs part # 795083 or old # 495770 also Lowe's has a kit #5083 which has the same parts.
Here we go;
Here we go;
Remove air cleaner, there are 2 bolts that hold things together, one on the front of the tank 3/8" and one into the block 1/2", remove these bolts, now "slowly" slide the carb/tank off the intake tube and breather tube, now tilt the tank in to release the throttle linkage and waalaa the carb/tank is removed. Remove the 5 screws from the carb/tank remove carb(don't loose the spring) now spray all holes, cracks and crevases in both the carb and tank surface with brake parts cleaner, remove the main screen(looks like a thimble) with a small screwdriver pry out the main jet(carefully) and clean it, reinstall the jet, it can be difficult some times to get it to snap back in place(I use the rounded end of a screwdriver handle). Remove and clean the fuel pickup stem. Clean any junk/rust from the tank. Install the diaphram on the tank then the gasket(no goo or sealer) now carefully replace the carb(the spring will try to misalign the diaphram), tighten all screws a little at a time so as not to crimp the diaphram until they are all tight. Install the carb/tank in reverse order and you are done. If I missed something one of the real mechanics will correct me. Have a good one. Geo
 
  #3  
Old 05-18-08, 03:08 PM
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Thanks for the reply. I think the new carb I put on came with a diaphram (thin black sheet of rubber with a spring behind it, fits with the carb gasket - correct?). I bought a whole new carb with gaskets, springs, thimble filter, etc. So I would not miss anything. Everything but the putting on the gasket and thimble filter was factory assembled.

I'm stumped.

Mike
 

Last edited by Mike DuLaney; 05-18-08 at 03:11 PM. Reason: clarification
  #4  
Old 05-19-08, 12:50 AM
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Is the o-ring in place in the carb where it mounts on the intake tube? Is the intake tube loose or cracked? If the o-ring is in place, and the tube is tight and in good shape, then there is a problem with either the carb, or the installation of it. I guess you got a new pickup tube with it too?
 
  #5  
Old 05-19-08, 05:19 AM
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Did you install diaphram to tank, then gasket, then carb?
 
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