After such long storage, you would need to check a lot of things. For starters, change the outboard motor oil, spark plugs and filters. The hoses will have loosened up and need re-tightening. Check the battery and propeller for damage and tighten all screws too. Then proceed to clean engine surface and fill it with fresh gasoline. Now test the engine in a small water body. For more details, visit http://www.ehow.com/how_8533895_prepare-outboard-engine-after-storage.html.