Bosse,
Yes........Yamaha has a*gauge that does both.
Going back to your fuel gauge issue, most boat owners trust there Fuel Management gauges more then there fuel tank level gauges for the same reasons in your other posts. The FM gauge actually keeps a tally of how much fuel has passed through the fuel system and gives you a on demand view of that in gallons per hour. You can also connect this new gauge up to your GPS for a speed input so the gauge can display speed and calculate miles per gallon.
Send me an email to
parts@shipyardisland.com if you would like a quote for one.
Andy
Here's a picture: