can I join my gas tanks?

[mallardtone-man]

hey guys sick of switching tanks on my motor when I run out I am assuming I can just buy some extra hose and fittings and put a splitter running from my main line to each tank. can anyone tell me if there is any reason this won't work? Thanks in advance for any help games

 

[Scott Danforth]

If you are talking small outboard tanks, it won't work vary well.

 

[mallardtone-man]

yes that is what I'm talking about they are six gallons Each. why is this? Not enough fuel pressure?

 

[Scott Danforth]

you could install a fuel tank a/b valve to supply fuel from A or B. however simply connecting them together with a tee fitting would result in your motor sucking air at one point or not sucking at all. remember, the fuel pump diaphragm and flappers on your outboard is only a small piece of fabric reinforced rubber the size of a nickle.

why not simply get a 12 gallon fuel tank.

 

[mallardtone-man]

Ok thanks

 

[Chinewalker]

Yep, won't work like that. As soon as one tank gets down to empty, and one WILL empty before the other, the pump will suck air from the empty tank rather than fuel from the one with fuel left... You can set it up so you have two tanks hooked to one line, but you'll need a valve between them. You could then simply switch between the tanks once one is kicked...

 

[Silvertip]

Worse yet both tanks will never be at the same exact level. When full the higher level tank will back feed the other and excess fuel goes out the vent and into the boat. This is simply a bad idea.