Cleaned carburetor on Tecumseh 4.5HP mower engine model LEV100 345016D it won't start unless spraying cleaner in the carburetor then runs only a few seconds not sure primer working?

clean the jets make sure there is a clean hole that goes all the way through them. be sure that gas is getting to the carb

This carb requires two good O rings on the fuel emulsion tube internally be in very good shape for the primer to work. Also needed is a good fuel bowl gasket seal and of course primer bulb with no leaks or tears. Replace any of these defective rubber parts as needed and it should start and run like new.

the main jet has a small hole in the side. make sure this is clean, use a small pc of wire and some carb cleaner, also has a jet in the middle, make sure all is clean, there is a pilot jet on the side, usually covered with a black plastic cover, remove the jet with a small flat blade screwdriver, clean that out with a small wire. get a tecumseh rebuild kit, replace the needle and seat, adjust the float. you can use compressed air to blow out all the holes, run some carb cleaner through all the jets you see. put it all back together and it should fire right up with a couple of pumps of the primer.