I will say that you are a great friend! I would think that especially if it has been outside, I would run it ASAP. I don’t know how the fuel system is after that long of a rest, but the quicker you can get it running, the better off it will be. See if it pumps water, use fuel with sea foam stabilizer in it, so any residue will at least have some chance of not turning into green junk. Get it up to normal temp, run it forward and reverse. Then fog it up again!
Steve