most likely you have an AQ131 model engine. On the top of the carb there was originally a plate that lists the engine type, firing order ect. I have the same engine, and have spent a lot of time playing with it. First off, change your oil (both the engine and the outdrive they're different). You need a battery; if its been sitting in the boat for 5 years maybe that one isn't any good any more. Those have fuel tanks that can't really be drained well, so probably you have some sludge in there. Get some good fuel cleaner like startron and put fresh gas in it. You have a closed cooling system (similar to a radiator in your car) so the big red box thing on the top front of the engine needs to be filled with coolant. That's the basics of what you need to do to get it started (also if the guy winterized it the plugs might still be out of the manifold and you'll need to know that). Hook the outdrive up to a hose if you have muffs or put it in a barrel full of water if you don't. At this point fire it up. It either starts or it doesn't. If it does, you'll have a series of things to do, if it doesn't youll have a different series of things. Get a selco manual (they're like hayes manuals for boats) they're very helpful. Good luck