Yeah, you need to quickly address that motor situation. If you do not have a manual, I can offer some suggestions until you get one:
Shoot some light oil (WD40, 656, etc) into the intake when turning over. Repeat a few times. Then pull the plugs, and flood the cylinders with the same oil. You need to displace all the water quickly, or it will rust and bind.
Then once you get the manual, follow the steps.
Any time an engine is submerged is is a battle against time. The sooner you either fire it up, or get it protected, the better.