SimBen, you may find a mechanic to come down and tell you the engine is toast
and you will need a new diesel or electric drive.
My best advise is to do a couple of check just to avoid disaster!!!!
Check the oil dipstick to see if the oil is still clear (free of water) and that the engine will turn over AFTER you shut off the water intake.
Popping out the spark plugs and seeing if they are wet from water in the cylinders. Once the plugs are out you can take an old towel and place it on top of the engine to cover the plug holes. Then open the throttle all the way with no choke on and give her a spin. The pistons will pump out anything inside enough to let you and us know what to start to look for.
The last mechanic I knew was in San Pedro at RS Marine~not sure they're still in business though. May be worth a call.
Post a couple pics of things too if you can
.
Dave Neptune