Lee I apologize, the answer to your question is so obvious that I thought you were making a joke. There is no such thing as a noob/stupid question. The serious answer is, Sorry that motor is trashed. Water ingestion damage starts to occur in as little as a few hours, even in fresh water, so a motor that's been submerged for over 3 months =history. Could you get that motor to run? Most likely the answer is yes but how long it will stay together is another story. As already mentioned, the issue is the bearings. Jet skis, or any other type of motors have precision fitted surfaces on the crank and needle bearings that need to withstand rpms of up to 7500. That's a lot of forces working in a motor so even the slightest bit of damage not visible to the eye will cause a motor to come apart. WD40 is a rust inhibiting lubricant, but it can't repair damage that's already occurred, even damage not visible to the naked eye. The drain plug on a Kawasaki is there to facilitate water removal from the crank IMMEDIATELY after it was sunk, and was not intended to be used several months down the road. A ski which has ANY kind of water ingestion in the motor needs to be cleaned out and started within hours of its sinking to avoid damage. BTW guys water DOES have Oxygen in it, Remember H20? (2 hydrogen molecules to 1 Oxygen molecule) and metal DOES get rust damage when completely submerged
