Wanting to empty the fuel tank, it is about 1/2 full and I have storage for the gas until I use it. What if I break one of the existing lines open, use a fitting to attach a length of braided flex hose that I have around and use the in tank fuel pump to empty the tank. I have a manual over ride on the fuel pump so I can run the pump without the motor being on. Obviously, no smoking, asking if this is a good idea.
Do it at work all the time, just know that when it starts speeding up/surging You don't want it to run more than a few seconds, otherwise as Pish said.... Stabil 360 either way, drain it or fill it to the brim, I've been filling Mine...