Had our boat done at the local dealer, and want to make sure I don't miss anything putting it all back together in the spring.

What are the typical connections they normally disconnect that I can check to make sure are put back so when we launch we don't have a leak. I know the majority of hoses to check but I'm not sure where the drain valves are on the engine, and if anything else normally gets taken out that needs to go back in.

thanks.