RedactedNarrative: operator reported that his child's eyes rolled back and he almost fell over the transom. The child was hanging over the back of the boat while the boat was idling and not moving in the no wake zone. Medics stated that the child's Carbon monoxide levels were elevated and he needed to be checkedinto a hospital. levels were at 32% during initial check. They dropped to 5% after the child victim was administered oxygen. Child was later transported to the hospital by his parents.