)I would not return to a different Tank, it will overflow. The true rate of return has too many factors, line and pump size engine differences etc. it could be as much 95% or lower who knows. If you trust your Gage you can find out (sort of) but its tricky. A couple of three way valves can designate flow to and from individual Tanks.
I do fuel systems and Emergency Generators and its a big NO NO to mix Tanks. Plus the two tank tops may not be the same elevation and though unlikely you can get a negative siphon effect and overflow that way too.
BUT it sounds like you are doing it now, I don't know what the safety is but it would be good to know. Most systems return enough fuel to keep the fuel clean and "polished" with all that motion at sea. Yours may be designed with a much slower rate of return.
I do fuel systems and Emergency Generators and its a big NO NO to mix Tanks. Plus the two tank tops may not be the same elevation and though unlikely you can get a negative siphon effect and overflow that way too.
BUT it sounds like you are doing it now, I don't know what the safety is but it would be good to know. Most systems return enough fuel to keep the fuel clean and "polished" with all that motion at sea. Yours may be designed with a much slower rate of return.
