I wanted to do an extended run fuel tank set up.
I wanted to set it up something like this.
So the first thing I learned is that the Hondas and Yamahas seem to have a built in fuel pump.
So when the fuel from the factory tank is used, it begins to suck fuel from the remote tank.
It turns out that the less expensive generators do not have a fuel pump.
So every example I find online seems to point to setting it up like a gravity feed through a gas cap.
Ever watch one of those videos??
Every one of them only seems to show it running for a few seconds.
Certainly not long enough to empty the internal tank.
It leads you to believe that - as long as the line is primed - it will begin to draw the fuel from the remote tank.
I make wine kits, and have to do a lot of siphoning.
It is the same process, except with the remote fuel tank, it uses a primer bulb to get it started.
If you have ever done any siphoning of liquids, you know that once the process is started, it does not stop until either YOU stop it or the liquid from the top unit is finished draining.
So how the heck is this supposed to work with a remote fuel tank??
If my genny has only a 2.5 gallon or so tank, and the remote tank is 6.5 gallons....
And I begin to siphon from the remote tank into the genny tank....
The fuel does not magically stop just because the genny tank is full.
It will just keep going until the remote tank is empty.
I even did it with 2 pails of water as an experiment. Just to be sure.
And sure enough, the water just kept flowing out of the top pail until it was empty.
Glad I did not try this on the genny.
I also tried to rig up a pulse pump.
I tested this thing on the big genny, and it pumps quite a bit of fuel, but definitely needs to be primed.
But on this smaller genny, it did not matter if it was primed, it would not get more than a trickle.
It certainly would not draw
fuel from a tank.
I think it's because there is not enough vacuum in these small engines.
But I'm not sure.
Back to the drawing board.
post edited by Blakkmoon - 2018/03/27 01:44:33