I'm ready to go parallel (generator)

When I first setup the external fuel, I was frustrated by the lack of fuel pump on the Yamaha... but all is not lost. Here is what works for me, maybe it will help others.

Prep) Run generator out of fuel completely... with the factory cap, let it run until it dies.

Step 1) The bottom of the external tank needs to be above the bottom of the internal tank. A few inches is probably all that's needed, a few feet works for me. Fuel does not leak out; when the generator is stopped, the fuel flow stops, as long as your cap seals properly and your fuel hose is in good condition.

Step 2) Open outboard tank air vent, attach hose to generator cap, attach cap to generator but don't tighten all the way yet

Step 3) Prime fuel hose using bulb, until you can hear/feel the air is out, then tighten cap on generator

Step 4) Start generator as normal, enjoy uninterrupted run-time for hours / days.

I finally went nuts trying to get the genny to suck gas out of the marine tank. I used a primer bulb and gave up on that and bought a new hose and tried several other connections and never did get it to run off the large tank.. to this day I still don't know what was wrong with that set up.

I don't think the small Yamaha gens have a fuel pump so they won't draw fuel by themselves. You could put your larger tank above the generators and hope they will gravity feed, or sit there and squeeze the fuel-line bulb. I'm sure someone else will chime in. Chino

You seem to have it covered.

Any thought about getting a second 6 gallon tank thought? That has a benefit of being double the hours. But I really don't know how many hours the single 6 gallon tank will run at 75% power. If it is 10 hours, and you would be happy with 5 hours when hooking up 2 generators, that is your choice.

Fred.