First determine the state of the plugs (wet or dry) before doing anything. If the plugs are dry check spark. If they are wet, take out all of the plugs and be sure the water intake valve is closed! Then crank the engine a few times for 10 seconds or so. This will get the excess water out of the cylinders. If you are going to let it sit add some oil and give a "quick" crank on the starter.
If wet and you do have spark I'd try to start and then shut down after a 15~20 seconds to determine it still runs OK. Remember the intake valve is still CLOSED.
Dry and use the old plugs to try and start. I have had very good luck restarting wet engines by heating the plugs on the stove and installing finger tight using a piece of hose over the ceramic. Then wire up and try a "shor time" starting cycle as the plugs may be wet again. Repeat the above until she starts.
Using or testing is a big help too with "motor crack" IE starting fluid is fine.
The heating of the plugs gives you a few extra rotations of the crank before getting wet again!
Dave Neptune
