Separate fuel return fittings in tank?

[Terra Nova]

Originally Posted by steve77

My "entry level boat builder" also took this "silly shortcut". We have an Amazon 49...

I am unfamiliar with an Amazon 49. Is the builder known for high quality or shortcuts?

[steve77]

Originally Posted by Terra Nova

I am unfamiliar with an Amazon 49. Is the builder known for high quality or shortcuts?

High quality, not shortcuts.

But stick to the question of the OP. In my experience on my boat, there is no problem with having the two diesel engines plumbed together with a common fuel pickup and return. But the OP could have smaller fuel lines, so for him it's possible it could cause a problem with the two engines running simultaneously. More information needed from the OP.

Steve

[Kokanee]

It’s impossible to advise without knowing more details such as the engine models and the fuel line size.
Some diesel engines return 90% of the fuel, some return 10%. Fuel line sizes and pressure ratings vary considerably.

All I can say is it will probably be ok if you tee in at the tank fitting. Hopefully you won’t overpressure your return line.

Does that give you enough confidence to take a shortcut?

[chris95040]

Originally Posted by billknny

Just because some people have "never seen it" doesn't mean it isn't done.



...My boat ...
...has worked perfectly for 23 years...
...There is no reason you need a separate return for each engine. None at all...
...you can be assured of never having a problem....

I love this logic- it works on my setup, so it must work on EVERY setup! (It reminds me of the perennial debate over whether or not you should leave your tranny in gear while sailing)

You need to read the manuals for your particular engines, understand them, and then you can make an informed decision.

Or, second best, listen to the folks giving general guidance about how these systems generally work, and hope for the best.

But never do something because someone with different hardware than you states definitively how your (unspecified) hardware will behave. They don’t know the specifics of your installation, and their ham-handed approach to logical induction makes anything they say suspect anyways, imho.

[Cheechako]

It works fine, just tee into the return line. I've done it 3-4 times.