What I am thinking now is install an electric fuel pump as a fill
carbs/backup emergency pump.
This way I would use the normal mech pumps when the engines are running.
I would have the electric pump on a manual switch. Which could be turned on
if the mech pumps failed and for starting.
I would tie into the fuel distribution tank select valves a fitting and run
a line into the pump and a split output to each carb. The pump would supply
up to 7 psi to each carb. The mech pumps internal valves would prevent fuel
flowing thru them in reverse direction.
The electric vane pump wont pass fuel if it is off right? So the mech pumps
would not reverse flow back thru the electric vane pump. All I need is a tee
fitting at the carb. My fuel lines are all the screw on flared type no
clamps anywhere.

This way I would get the benefit I desire which is filling the bowls without
excessive cranking and have a backup.
I am still thinking on this.
I would prefer to push the fuel to each carb thru the filters and mech pumps
and then on to the carbs.

"Gary Warner" wrote in message
...

As has been said, 1 pump goes bad and both motors are out.

Not knowing anything about all this, what of the opposite situation:
One engine has some different problem and is stopped. Does
the fuel pump still pump gas to it....or can some line shut-off
work to prevent that?

Also: On my mechanical fuel pump, there is a little manual
pump lever. To fill the bowl you can pump that by hand
instead of cranking the engine.

Gary