Stubby wrote:
I replaced the fuel pump on the B&S engine in my John Deere lawn
tractor. But, it doesn't pump fuel and I wonder if I have to prime
it. Fuel is reaching the input side via the filer, but nothing comes
out of the output side. There is a third hose on the pump which I
presume is vacuum or pressure that make the pump work. Can anyone
help? TIA

That third hose connects to the crankcase and uses the alternating
pressure vacuum to operate the pump diaphragm. So make sure that third
hose is connected and in good shape.

Priming it won't hurt but should not really be necessary.

--
Art