4 hp Gnat with an added fuel pump

[[email protected]]

This link was on Marine Engine.com/Youtube. It shows a 4 HP Gnat with an added fuel pump and fuel filter. The fuel pump (hidden behind hoses) was added because these Gnat's were famous for not gravity feeding. I'd like to know what fuel pump was used as these are very tight quarters. Was it a small electric pump? Something had to provide the pulse but on this engine I can't see that happening. If anyone has a photo or link to a fuel pump that would work that would be much appeciated.
Help please, Larry

Mercury GNAT 4 HP 2 stroke outboard with homemade tiller extension and fuel pump - YouTube