The Ford Barn

dbdevkc · 10-22-2025, 11:07 PM

I have an in-line electric fuel pump that we installed to help fill the carb bowl after the flathead sits for a while. But when we turn on the electric pump (before attempting to start the engine), it fills the mechanical fuel pump glass bowl then immediately the gas starts squirting out of the top of the mechanical pump glass bowl. As if the fuel is not passing through the mechanical pump into the carb. We did remove the fuel line from the carb and verified that while cranking, the mechanical pump (alone - electric pump off) is pushing a bit of fuel through. We have not tried turning on the electric pump with the fuel line removed from the carb because we were a bit freaked out with the fuel coming out of the mechanical glass bowl and just assumed that the mechanical is not letting the fuel pass through for some reason.

Any ideas?

10-22-2025, 11:07 PM	#1
dbdevkc Member Join Date: Dec 2023 Posts: 38	in-line elec fuel pump not pushing through mechanical pump I have an in-line electric fuel pump that we installed to help fill the carb bowl after the flathead sits for a while. But when we turn on the electric pump (before attempting to start the engine), it fills the mechanical fuel pump glass bowl then immediately the gas starts squirting out of the top of the mechanical pump glass bowl. As if the fuel is not passing through the mechanical pump into the carb. We did remove the fuel line from the carb and verified that while cranking, the mechanical pump (alone - electric pump off) is pushing a bit of fuel through. We have not tried turning on the electric pump with the fuel line removed from the carb because we were a bit freaked out with the fuel coming out of the mechanical glass bowl and just assumed that the mechanical is not letting the fuel pass through for some reason. Any ideas?