Our boat leaks a lot but today the bilge pumps failed, luckily a neighbour
called us before it sank completely.

Anyway, our three cylinder raw water cooled Yanmar diesel engine got flooded
little over half way. Starter and solenoid were completely submerged under
water. Air intake remained on surface. Exhaust remained over surface and I
believe that no water got inside the combustion chambers.
The flywheel casing has openings and was completely filled with salt water.
I didn't try to start the engine for I was worried possible damage to the
started and electrical circuitry.

My question is that what should I do now?

Thanks for any tips,

Joe