Further intereting reading re these new Navman units can be found at following address (go to page 37 on pdf file)http://www.navman.com/assets/marine/...20Euro2004.pdf
It does appear that these units will operate on (I quote):-
any carburetted 2 stroke outboard from 50 - 300hp
any EFI 2 stroke outboard from 50 - 300hp
any 4 stroke outboard from 90 - 300hp
any sterndrive or inboard from 70 - 450hp
The only fly in the ointment is that you need to ensure that by fitting the flow sensor in the inlet line this does not exceed the manufacturers recommended back flow pressure.
And that the flow sensor is always fitted AFTER the primary fuel filter.
Hope the above has been of some interest to all parties.