electric fuel pump.

[nistri]

An electric fuel pump might be delivering too much fuel unless careful adjustement is made with the fuel pressure regulator. A value of  3-4 psi seems to be OK.
Andrea

[lanciab20]

I fitted a Facet pump to my 1600 HF (it has Dellortos) because of the absence of a manual priming facility.  When starting the car after a couple of weeks standing it took a lot of grinding away on the starter to get fuel up to the carbs.  My pump sits in the area behind the righthand headlamps, quite low down, and pumps through the mechanical pump.  It is operated by a switch hidden underneath the dash near the choke lever and I use it only for starts after a period of inactivity.  About 5 seconds or so only is enough to recharge the float chambers and the sound of the pump gives an indication of progress. No pressure regulator is fitted, the recirculating line is retained.  It works well.  As a bonus I suppose that if the mechanical pump developed a fault it would serve as a get-you-home, or longer, but I am not aware that the mechanical pump is unreliable.