Primer bubble sucks in whilst mowing then mower dies primer stays stuck in but mower will start and run for a short time again then dies ?

SOURCE: Toro walk behind model 20025 Gas running through the carburetor

Carb. float must be stuck open. First if you have no fuel in the tank it must all be in the crankcase.Drain the oil and refill and also check the carb as the float has to be sticking open. Hope this will help you. Donnyb60

SOURCE: Can't keep mower running without consistently pushing the primer.

It sounds like there is water in the gas. The only way to remedy this is to take the carb off of the gas tank and replace the diaphragm, there is a small reservoir between the tank and carb...clean with WD-40 to remove water

SOURCE: 158cc yard machine, starts then dies.

Your fuel tank and carb need to be removed, both cleaned and replace pump diaphragm between carb and tank. If you want to do it yourself, let me know and I;ll tell you how. Not a difficult job. Dwain

SOURCE: My Mower won't stay started after it uses the gas that has been pushing into the mower via the primer bulb

either the magneto or the governor is damaged check them

SOURCE: Edger will not stay running

Your diagfram is bad replace it in your carb and you will be ok