I have both electric and Kohler mechanical pumps in series.
Just use electric as a primer.
Never been a problem.

I always fit Facet pumps to my craft

What is the current thinking regarding fuel pumps?

There isn't any - either you need one or you don't.  The lift height of the pulse pump is 18".

I'm thinking that this pump would be a good match


FACET 60104 POSI FLOW FUEL PUMP 1.5-4.0 Psi - RATED 150 BHP | eBay

What is the current thinking regarding fuel pumps?


Currently the Marlin is fitted with the original vacuum/diaphragm type fuel pump and a fuel primer bulb.  Is it better to use this pump or fit a low pressure electric fuel pump?