What's the best way to clean it out I overfilled my motor and it puked a bunch of oil and mixed with water in the bilge. Any advise trying Dawn and adding water sloshing it around.

ive been a fan of simple green, but i bought a bottle of purple power cleaner at autozone on sale the other day (two bottles for $5) and it works great! 

Dawn and Hot water, throw 5 gallons of hot water in the bilge and about 3 oz. of dawn and go for a drive (on the trailer, don't push that shit into the waterways).

Once it has sloshed around for a few, drain the hull into a drain pan and let the water evaporate off...

Then grab the simple green and a hose and finish up, should be very little oil left in there.

GT