Hello, looking for some quick insight. Looking into buying a pontoon with a 2001 Mercury Outboard 90 HP ( I have not physically seen the engine, this is all I know about it). Boat has sat for 2 years without being run, but owner claims to have had it properly winterized each year. The engine will crank, but not turn over. With it not being started in 2 years, perhaps some old gas causing the issue? Im going to take some carb starter down with me, maybe some new plugs too, but any other insight would be appreciated.