Mine is set up to run when the key is 'on'. It is just an inline fuel pump
. I just break open the bleeder on the engine
mounted bleeder or remove the cover of the filter, turn the battery
switch to on (while the key is turned on) to activate the pump to fill the filter. then switch the battery
switch to off to shut off the power to the pump once it is bled.
If your battery switch is not located near the engine/bleeder/filter, you could mount a switch that is more easily accessed near the engine/bleeder(s)
Just need a 12v pump, connectors, and wiring
to a 12v switched source. Mine is actually an automotive pump. Not marine
grade, but if it fails, the mechanical engine
pump still works, so it wont leave you stranded.
Many frown upon an electric pump
as it could, unintentionally, pump fuel
into the bilge
if there is a leak somewhere, where the engine mounted pump would suck air and stop running all together. You could just use the pump as a bleeding pump on its own switch and let the engine mounted pump do the work when it is running, and leave the electric pump
off once it is primed, if that is a concern.
But install (mine was done by the previous owner) looks quite simple - cut the existing fuel
line, install proper fuel line fittings, install the pump, wire to 12v switched power and ground. done. what pump? I have no idea. I would error on lower pressure than higher, as you just need it to bleed. I would contact a boat yard or professional installer for the best practice to splice new fittings on your existing fuel lines (or have them make them up for you - shouldn't be expensive).