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Briggs and Stratton 9J902 Carb


mountra's Avatar
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Join Date: May 2008
Posts: 1
TX

05-26-08, 08:54 AM   #1  
Briggs and Stratton 9J902 Carb

I am stuck trying to remove this carburetor. I have dismantled the linkages and removed the 5 screws but am unable to lift the carb away from the engine block and out of the tank. The whole assembly seems to be free but wont slide back to allow me to lift it up and out. Is there something else I have to remove?
The carb is on a Yard Machine Edger. Engine# 9J902,
Model# 0368E1, Code# 05020752.

Thanks.

 
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05-26-08, 12:38 PM   #2  
It sounds like you didn't remove the tank so I will post the step by step diaphram replacement and you can pick up wherever you are currently.
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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07-19-10, 09:29 PM   #3  
Posted By: geogrubb It sounds like you didn't remove the tank so I will post the step by step diaphram replacement and you can pick up wherever you are currently.
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





Thanks geogrubb... I have the same edger, and similar problem (their tech support is no help) I blew through the fuel pick up tube, and replaced the diaphragm, but didn't think to remove the screen and clean the jet... Mine runs on primer gas, but then quits. If you get to the primer bulb before it stops, you can keep it running for a short time. I was about to replace the entire carb, but I'll try the screen and jet issue first....

 
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07-20-10, 08:55 AM   #4  
Posted By: sven54245 Thanks geogrubb... I have the same edger, and similar problem (their tech support is no help) I blew through the fuel pick up tube, and replaced the diaphragm, but didn't think to remove the screen and clean the jet... Mine runs on primer gas, but then quits. If you get to the primer bulb before it stops, you can keep it running for a short time. I was about to replace the entire carb, but I'll try the screen and jet issue first....
The link below should have the pics in it, if the "O" ring on the jet is damaged it must be replaced. Have a good one. Geo

http://forum.doityourself.com/outdoo...ml#post1570032

 
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07-20-10, 10:17 PM   #5  
Thank you geogrubb

Posted By: geogrubb It sounds like you didn't remove the tank so I will post the step by step diaphram replacement and you can pick up wherever you are currently.
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



Two thumbs up to you...
I removed the small screen (thimble) inside the carburetor and sprayed it out, I also CAREFULLY removed the small inserted piece for the jet sprayer and also sprayed it out as well as inside its area with carb cleaner. Then just as an added measure, I unscrewed the muffler (mine doesn't have two bolts) sprayed it out with the carb cleaner and then used an air compressor to blow it out and dry it.
I reassembled everything, kept my fingers crossed, and tried starting it... I felt like Dr. Frankenstein...

IT'S ALIVE !!! IT'S ALIVE !!!

Thank you for the detailed instructions and the added suggestions on what to try or do...
A $3 diaphragm, and a $4 can of carb cleaner, and it runs like new !!!

 
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07-21-10, 09:07 AM   #6  
Posted By: sven54245



Two thumbs up to you...
I removed the small screen (thimble) inside the carburetor and sprayed it out, I also CAREFULLY removed the small inserted piece for the jet sprayer and also sprayed it out as well as inside its area with carb cleaner. Then just as an added measure, I unscrewed the muffler (mine doesn't have two bolts) sprayed it out with the carb cleaner and then used an air compressor to blow it out and dry it.
I reassembled everything, kept my fingers crossed, and tried starting it... I felt like Dr. Frankenstein...

IT'S ALIVE !!! IT'S ALIVE !!!

Thank you for the detailed instructions and the added suggestions on what to try or do...
A $3 diaphragm, and a $4 can of carb cleaner, and it runs like new !!!
Success is a wonderful sound. Have a good one. Geo

 
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