Briggs Carburetor dies when accelerating

[tim4]

Also those tubes have a check ball in them.

 

[Forest#2]

Also those tubes have a check ball in them.

Your does not.
If the pump diaphragm is on the side of the pulsa jet carb it does not have the check ball tube. The flappers on the diaphragm is the check valve.
Also most generally it will be found that these type carbs engines start easier with less manual cranking after they have been at rest long time if the gas tank is full when trying to get a startup without using a prime into the carb throat because the long pickup tube is being used to pump fuel into the upper bowl for the short tube when the fuel level in the tank is below the bottom of the short tube.
(take more manual rope cranking to get the carb's short pickup tube fuel bowl primed)


Most generally the pulsa jet carbs with the check ball in the PLASTIC pickup tube have the pump diaphragm UNDER the carb body on top of the tank and have to have a good seal between the diaphragm and the top of the tank to operate properly.
and were used on the 3.5 vertical crankshaft engines.
Here is a link to one type of the check ball in the tube type pulsa jet

Disassembly, Repair of Briggs Tank-mounted Vacu-jet Automatic Choke Carburetor

outdoorpowerinfo.com

 

[tim4]

I thought that type had a check ball because I could blow in to the long tube but could not suck the tube so that is because the flapper valve thanks.