mower help needed


Old 04-26-08, 02:58 PM
Thread Starter
Join Date: Sep 2004
Location: usa
Posts: 213
mower help needed

push mower, 3.5 briggs & stratton.
carb on top of metal gas tank.
primer button wont work. changed button but still dont work any ideas as to what and where to look for problem ??

mower will run if gas is poured down carb.

Last edited by tecate87; 04-26-08 at 02:59 PM. Reason: add part
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Old 04-26-08, 06:51 PM
Join Date: Jun 2006
Location: St. Louis
Posts: 2,365
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
Old 04-27-08, 03:15 PM
Thread Starter
Join Date: Sep 2004
Location: usa
Posts: 213

thanks Geo, got it running.

ALready had it apart a number of times trying to clean or see anything wrong.
So when I got the parts I knew where to go, I still had it apart 3 different times before it worked. Last time it was apart, I cleaned it again, changed the spring that came with the kit, then it worked. So I am not 100% sure what it was exactly, but one of the above, spring, diaphram or just cleaning. thanks again, much appreciated.


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