Glock,First, your shut-off valve. Below your livewell/washdown valve compartment is an access door. Open it, stick your head in, and look down and forward, you'll see a valve attached to the pickup on the bottom of the boat, just to the starboard of the keel. Most likely it will have a yellow handle. The handle should be straight up and down, indicating it is open. If it is perpendicular to the valve body, it is closed. Also try to run a coat hanger up through the pickup from the bottom of the boat and see if you encounter any obstructions.
Second, your ignition key. There should be a number stamped on it. OMC (and even BRP today) used about 20 different keys on all there key switches (yes, your key can start at least 1 in 20 OMC/BRP powered boats!). Let me know the number, and chances are we have one at work. If we do, I'll send it to you. Your binnacle has the key switch built in, doesn't it?