To answer estebanj first, The engines are not Smartcraft engines. This is a 1997 boat with twin 7.4MPI's.
Anf FRank, you mention the cercumstances where I want to know what my burn rate is. I have a variety of loads from just me and the wife as well as others where there is a boat load of...
Can anyone recommend a fuel flow meter that plugs directly into the ECM instead of installing a valve in the gas lines?
It can be a multi-purpose gauge, too.