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edger wont stay running

greg1069's Avatar

Join Date: Sep 2008
Posts: 1

09-21-08, 10:08 AM   #1  
edger wont stay running

I seen this question asked but i think mine is different.I have a edger with a b&s 4.0 hp 158cc engine.It will not stay running,i can prime it just like the instructions(3 times) say.I pull it to start it up and it will run very briefly then quit.It has the plastic carb.I took it off and looked at it(not really know what im looking at) but nothing seemed out of place.any suggestions!

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30yearTech's Avatar

Join Date: Oct 2006
Posts: 1,176

09-21-08, 12:00 PM   #2  
Model Type and Code number from engine would be helpful. I would suspect you have a diaphragm carburetor and the diaphragm may need replaceing or you may have something restricting the main jet.

geogrubb's Avatar

Join Date: Jun 2006
Posts: 2,333

09-21-08, 07:11 PM   #3  
I agree with 30yr
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

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