Personally, I wouldn't leave the parts sitting in fuel for any length of time, but that's in the past now. When one of my boat engines ends up under water, I just flush it out and run it again. If I can't run it, I flush with WD-40 and then lube it up with after run oil (I use Marvel Airtool Oil).

If it were my engine, I'd rinse the parts with alcohol (rubbing or denatured), dry them off, and then put it in the oven at 200 for a few minutes. The heat will evaporate any remaining alcohol. Once the parts are cool, lube them with some kind of machine oil (3 in 1, sewing machine, or Marvel Airtool) and begin reassembly. Also, while the engine is apart, check the bearings. If you feel any roughness, spend the $20 or so it'll cost for a new set.