Lakeside Marina in Oshkosh, WI is a full service marina selling new and used boats. Certified warranty and repair center for Mercury Outboards, Mercruiser Sterndrives and Volvo Penta engines and drives. We Buy Used Boats for Cash! Servicing Green Bay, Appleton, Madison, Milwaukee, Fond du Lac, Stevens Point and Chicago. Dealer for Bayliner Boats, Chaparral Boats, Avalon Pontoons, Tahoe Pontoons. Boat Rentals