Mechanical Services — Marine Diesel Engine Repair in Anacortes, WA

Marine diesel engine repair technician at North Harbor Diesel
Mechanical Services

Marine Diesel Engine
Experts

Factory-trained technicians specializing in diesel engine repair, preventative maintenance, generator service, and complete propulsion systems.

Authorized & Factory-Trained On Leading Brands

Volvo Penta
Northern Lights
Cummins
Yamaha
Mercury Marine
What We Do

Complete Mechanical Services

Diesel Engine Repair

Complete diagnosis, repair, and overhaul of marine diesel engines. We work on all major brands including Volvo Penta, Cummins, CAT, Hino and more.

  • Engine diagnostics
  • Cylinder head work
  • Injector service
  • Turbocharger repair
  • Engine overhauls
  • Repower projects

Preventative Maintenance

Scheduled maintenance programs to keep your vessel running reliably season after season. Protect your investment with expert preventative care.

  • Annual service packages
  • Oil & filter changes
  • Belt & hose inspection
  • Fluid analysis
  • Impeller replacement
  • Zinc replacement

Generator Service

Marine generator installation, repair, and maintenance. We service all major brands including Northern Lights and Onan. We can handle everything from routine service to complete replacement.

  • Generator diagnostics
  • Cooling System Repairs
  • Control panel repair
  • Exhaust system service
  • Generator installation
  • Emergency service

Fuel Systems

Complete fuel system service including tank cleaning, polishing, line replacement, and injector service to ensure clean, reliable fuel delivery.

  • Fuel filter Replacement
  • Fuel polishing
  • Injector Test and Rebuild
  • Fuel line replacement
  • Lift pump service
  • Fuel Tanks Replacement

Cooling Systems

Raw water and freshwater cooling system service, including heat exchanger cleaning, impeller replacement, and thermostat service.

  • Heat exchanger service
  • Raw water pump repair
  • Thermostat replacement
  • Coolant flush
  • Aftercooler Service
  • Raw Water Intake and Thr-hulls

Propulsion Systems

Shaft, propeller, cutlass bearing, and stuffing box service. We handle everything from routine inspection to complete propulsion overhauls.

  • Shaft alignment
  • Propeller repair
  • Cutlass bearing replacement
  • Dripless Shaft Seals and Gland Service
  • Strut repair
  • Grounding Damage Repair
Volvo Penta Factory-Trained
Yamaha Certified
ABYC Certified
Cummins Service
Mercury Marine
FAQ

Common Questions

What diesel engine brands do you service?

We service all major marine diesel brands including Volvo Penta, Yanmar, Cummins, Caterpillar, John Deere, Detroit Diesel, and more. Our technicians are factory-trained on Volvo Penta and Yanmar systems.

Do you offer emergency service?

Yes. For urgent mechanical issues, call our service department at (360) 299-1920. We do our best to accommodate emergency situations and can often provide guidance over the phone.

How long does a typical engine service take?

Routine annual service typically takes 1–2 days. More complex work like overhauls or repowers can take 2–6 weeks depending on parts availability and scope. We provide detailed timelines before starting any work.

Can you handle repowers?

Absolutely. Engine repowers are one of our specialties. We can help you select the right replacement engine, handle all installation work, and manage the entire project from start to finish.

Get Started Today

Need Mechanical
Service?

Call our service department or submit a service request online. We'll get back to you quickly with a diagnosis and estimate.