No power to fuel pump

[Romanovich]

Good evening I’ve got a mercruiser 5.0 carburated and can’t get the fuel pump to work while key on or spinning it over. I’ve bench tested it and works. I’m not sure if these have relays? I was unable to find any. Any help would be appreciated thank you!

 

[Bt Doctur]

you should have a pressure switch near the oil filter. most likely purple/yellow stripe. a better idea is to run the fuel pump thru a cube type relay. prevents the switch from burning out from high fuel pump current