I have a 21' almar with a 454 inboard around the early 80's. needless to say my sending units don't word reliably worth a ****, do they make some kind of digital flow meter for those old 4 barrel carbs that can give me gph and gal consumed since last reset?? Also it has 3 tanks that I cannot get to the sending units with out a MAJOR overhaul. I don't need one for each tank just one I can reset to see how much I have used. My current GPH usage is.... alot... I would like to get alittle more accurate than that. Right now I use a dip stick and check it every time I stop but that is a pain.
Thanks for any help