Irwin Marine, Alton Bay

396 Main Street Alton Bay, NH 03810

396 Main Street
P.O. Box 505
Alton Bay, NH 03810

Phone: 603-875-8848

Mon - Sat: 8am - 5 pm
Sun: 10am – 5pm

Mon - Sat: 8am - 5pm

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At our Alton Bay location we offer all parts and accessories to fulfill your boating needs. Including—but not limited to—all coastguard approved safety gear required to fill your boat, electrical/canvas/trailer hardware, cleaning supplies, engine oil and lubricants. Plus more fun to have on the water with tubes, skis, wakeboards, wakesurfs, paddleboards, canoes and kayaks. Being a certified BRP dealer we also sell SeaDoo PWC’s, SkiDoo snowmobiles, and all parts, accessories, safety equipment and riding gear to go along with them.

Services Offered at Alton Bay

Boat Repair

  • Boat Maintenance
  • Air Conditioning Service
  • Sink and Toilet Protection
  • Pontoon Boat Deck Maintenance
  • Trailer Maintenance
  • Canvas Care
  • Rigging and Lines

Powertrain Maintenance
Stern Drive / Inboard Engines

  • Oil and Filter/Lube Service
  • Computer Diagnostic Check
  • Engine Tune-Up
  • Cooling System Flush
  • Bravo + Inboard Seawater Pump Service
  • Transmission Maintenance Program

Stern Drives

  • Stern Drive Maintenance Program Alpha 1
  • Stern Drive Maintenance Program Alpha-Generation 2
  • Stern Drive Maintenance Program Bravo
  • Corrosion Protection Packages


Full Fiberglass Shop
Fiberglass Repair: Minor Gelcoat scratches to Complete Finish Restorations

Ships Store
Complete marine & powersports supply store.

GPS, Paddles, Life Vests, Cleaning Supplies, Gift Certificates and more.

Clean and Wax
Interior Detailing

Contact Us

Brands Available at Alton Bay