John’s Mobile Marine Service LLC
John’s Mobile Marine provides fast and reliable service in the Baltimore MD, Annapolis MD, and Washington DC areas. Servicing even far beyond the general listed area Johns Mobile Marine comes to you for your boats Diagnostic repair & Maintenance!
- Boat Service
- Marine Audio
- Boat Cleaning
- Boat Winterization
- Boat Drive Service
- Marine Electronics
- Boat Mechanic
Bull on the Bay Marine Services LLC
Marine Electronics Installation & Service
At Bull on the Bay, we specialize in professional marine electronics services built on quality, precision, and performance. Whether you’re upgrading your electronics or outfitting a new vessel, we provide expert installation and support for systems of all sizes.
We are proud authorized dealers of top-tier brands including Garmin, Raymarine, Simrad, B&G, Lowrance, JL Audio, Fusion, Airmar, and more—ensuring you get genuine products backed by manufacturer warranties and expert knowledge.
From advanced chart plotters, radar, sonar, and transducers, to complete NMEA 2000 networks, autopilot systems, stereo installs, battery monitors, switches, and clean wiring jobs, we handle every detail with care.
When you book with Bull on the Bay, you’re not just getting a service—you’re getting guaranteed satisfaction, dependable results, and the peace of mind that comes from working with pros who care about your boat as much as you do.
- Boat Service
- Marine Audio
- Marina
- Marine Electronics
- Boat Stereo Installation
- Boat Satellite TV
- Underwater Boat Lighting
Line Six Services
For over 35 years, Line Six Services has been striving to provide our customers with the best quality service possible. From bow thrusters to yacht transport to electronics and air conditioning, we install it all. When we're done with your project you won't know it didn't come from the factory like that! Line Six Services is contracted by some of the industry's largest and most prestigious yacht manufacturers because of our utmost attention to detail in every job we do.
- Boat Service
- Boat Transport
- Boat Winterization
- Marina
- Boat Thruster Repair
- Boat Heating And Cooling
- Marine Electronics
J&J Marine
J&J Marine is your full-service boating facility for Engine Diagnostics, Parts, Repairs, Boat Sales, Trailer Rentals and Sales, Transport and Storage. If high performance is your obsession, look no further than J & J Marine. Whether you need routine boat maintenance, off-season storage, or a custom-built engine to make some waves out on the water, our highly-skilled, experienced and well-equipped boat repair and service team is here to service all of your boating needs.
- Boat Trailer Rental
- Boat Service
- Boat Repair
- Boat Storage
- Boat Transport
- Boat Hauling
- Boat Movers
Kompletely Kustom Marine
Kompletely Kustom Marine, Inc. provides all levels of yacht management, including but not limited to full service engine/generator repair and installation of both gas and diesel engines, concierge/chauffeur services, boat detailing, shrink wrap, winterization, custom maintenance packages, generator service and installation, watermaker service and installation, captain’s service, dive service, as well as a full range of other boat services – too many to list – to Maryland’s Eastern Shore, Annapolis, Baltimore, District of Columbia, Northern Virginia, and Delaware areas.
- Boat Service
- Fiberglass Repair
- Boat Heating And Cooling
- Boat Motor Repair
- Marine Generator Repair
- Outboard Service
- Boat Washing
Mallard Marine Services
Mobile electrical, electronics, mechanical and plumbing, sales and service.
- Boat Service
- Boat Winterization
- Marine Electronics
- Boat Mechanic
- Outboard Service
- Mobile Boat Mechanic
- Boat Repair
Sunset Harbor Marina
Sunset Harbor Marina is a marina located in Essex, Maryland. We offer a fully equipped service center, indoor and outdoor storage and haul out services.
- Boat Service
- Boat Storage
- Boat Slips For Rent
- Marina
- Boat Cover
- Covered Boat Storage
- Full Service Marina
Anchor Bay East Marina
Full service boatyard and marina. Fixed and floating piers. 2 travel lifts, fuel dock with pump out. Bathhouse and restaurant on site.
- Boat Painting
- Bottom Painting
- Boat Service
- Boat Mechanic
- Boat Motor Repair
- Outboard Service
- Boat Slips For Rent
Boats On-Site
Cant get to a shop? We come to you! *Insured* Boats, Inboard, Outboards and newer model Jet-skis Winterizing, fiberglass repair, motor repair, Gel coat, trailer maintenance, transom repair, flooring and carpet. Almost anything boat and jet-ski related. Currently servicing most of Frederick, Carroll, Howard, and parts of Montgomery and Washington county, Southern PA and Northern VA with the possibility of traveling further with mileage. Call or email for more information. Free local estimates
- Boat Service
- Fiberglass Repair
- Boat Painting
- Boat Trailer Sales
- Boat Winterization
- Marina
- Boat Drive Service
Lorenzo’s engine tech
20+ years as engine builder and rebuilder for automotive and mercury marine engines . Diagnosis for engine electrical and mechanical. Full engine tuneups and in boat top repair , cooling system fuel system ignition system all belt drives and engine oil leaks
- Boat Service
- Boat Motor Repair
- Marine Generator Repair
- Boat Mechanic
- Mobile Boat Mechanic
- Boat Trailer Sales
- Boat Trailer Repair









