2006 320 5.0 Volvo'

[Dark_Tide]

I have the 50 GXi motors with the penta drives.

What RPM is everyone running at for 30 mph in the boat?
And what is the Gallons per Hour burn rate for that?
I am trying to plan a trip and would like to see what everyone is getting
Thanks!!

 

[Scott Danforth]

Your question assumes everyones boats have the same boat hull, same gear ratio, same prop, same load, same wind, same trim angle, etc.

2 identical boats can have different RPMs at cruise

Your burn rate is 0.4# of fuel per HP commanded

 

[Dark_Tide]

Wow, what a welcoming response. I guess no one averages things?
Typically I would take a series of answers and use that as a guide to try and understand where the median is. Alrhough it may not be highly acurate, it would give an idea of expectations.