mech fuel pump- i believe so, as there are no seeable wires going from it, just hoses. and i had primed it with starting fluid before i tried to start. the previous carb was going out anyway, so i felt like replacing something that needed replacement anyway, but its still not getting fuel. before i replaced the carb, there wasnt much if any fuel in the filter- its one of those visible inline filters, ya know? i probably should try to see if i take the filter off if fuel runs through the line or not. i have a feeling its the pump though