Briggs & Stratton Help

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  #1  
Old 04-15-09, 02:57 PM
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Briggs & Stratton Help

I have a Weed Eater brand walk behind mower.It ran fine last fall. When I fired it up last weekend, it runs for a couple of seconds then dies. It's just running on what gas is in the carb from pushing the primer bulb. The carb sits on top of the gas tank so I cannot see any gas lines to speak of to blow out with air.It's a B/S 148cc-300 series, it's full of fresh gas,starts on the first pull.Any ideas of where to start?
 
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  #2  
Old 04-15-09, 04:41 PM
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Betcha didn't use fuel stabilizer before you put it away last fall. This is the classic symptom of old gas gumming things up. You likely need to remove the carb and tank, disassemble and clean thoroughly. Install a new diaphragm/gasket while you are at it.
 
  #3  
Old 04-15-09, 04:43 PM
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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;
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
 
  #4  
Old 04-19-09, 09:59 AM
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I cheated & got lucky. You guys got me to thinking about the carb being gummed up, so I squirted some carb cleaner down the carb & let it set, then started it up & kept giving it tiny shots of carb cleaner & it runs great now. Thanks for the help.
 
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