any coota craft owners got a answer? there are videos of cootacraft and formula 233 launching off waves like missles, sure does look good but landing back in water surely is less forgiving than hitting hard surface areas like sandbanks,rocks and whales. perhaps your prop on re-entry managed to stress some cogs and the rest of the trip finished them off but really its a unknown.really the prop should off give up or bent or bush striped first off id be thinking.