HP Marine is dedicated to Power Boat services, including powerboat service, maintenance, weather protection, and the sale of power motor boats. Hoaks Performance Marine or HP Marine is located in beautiful Havre de Grace, Maryland. Located at Tidewater Marina at the bottom of Bourbon Street, HP Marine specializes in powerboat repairs, sorry sailboat owners. Owner Mike Hoak works on all manner of boats, including gas, diesel and outboard engines. He’ll also do general electrical and mechanical repairs. HP Marine is a Suzuki dealer, but also sells parts for and works on MerCruiser, Volvo, Yamaha, Evenrude, among many others.