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Occoquan Harbour Marina offers a full service marina. Boat engine repairs, Boat wash and wax detailing services, travel lift, and much more. Full boat repair service on the Potomac River. Our 25 Ton Travel Lift is used for short hauls, pressure washing, acid washing and hauling and blocking. Engine Repairs, Mercruiser Engine Repair, Volvo Outdrive Repair, Mercury Outdrive Repair and all other Boat Engine Repairs. Ensuring your boat is ready for the cold winter season. We offer complete and partial winterization. Complete bottom paint using Petit & Interlux, pressure washing and acid washing services. We can handle minor scuffs or major boat fiberglass repair. We service and repair boat engines including Mercruiser, Volvo, Cummins and more. Occoquan Harbour Marina boat mechanics are Mercury Certified.