Providers identified below as Engine Survey / Inspection specifically advertise mechanical surveys, engine surveys, or pre-purchase diesel engine inspections.

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Bellingham 

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Northwest Diesel Power — Bellingham

Specialties: Marine diesel diagnostics, maintenance, repair, overhaul, repowers, generators, electronic engine controls and vessel systems.

Engine Brands: Volvo Penta specialist and authorized parts/service provider.

Engine Survey / Inspection Available: Yes — pre-purchase mechanical surveys of engines and generators, including oil sampling and written reports.

Phone: 360-734-2502

Northwest Diesel Power serves Bellingham, Anacortes, the San Juan Islands and the greater Puget Sound/Salish Sea region.

 

Anacortes & Skagit County

North Harbor Diesel & Yacht Service — Anacortes

Specialties: Marine diesel repair, maintenance, engine overhauls, repowers, generator service, fuel systems, cooling systems and running gear.

Engine Brands: Volvo Penta specialty; experience also includes Cummins, Hino, MAN and other marine diesels.

Phone: 360-293-5551
Website: North Harbor Diesel

North Harbor operates a full-service facility in Anacortes with a dedicated diesel/mechanical department.

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Gregg's Diesel Service — Anacortes

Specialties: Marine diesel maintenance and repair, complete engine overhaul/rebuilding, repowers, transmissions, fuel-system diagnostics and generator service.

Engine Experience: John Deere, Mitsubishi, Kubota, Caterpillar, Detroit Diesel, Ford Lehman, Yanmar, Cummins, Onan and others.

Phone: 360-293-9655

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Port Townsend & Olympic Peninsula

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SEA Marine — Port Townsend

Specialties: Marine diesel repair, routine maintenance, propulsion systems, repowers and generator installations/service.

Engine Brands: Authorized Volvo Penta and Beta Marine dealer.

Phone: 360-385-4000

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Everett & North Puget Sound

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PSC Marine — Everett

Specialties: Marine diesel diagnostics and repair, engine overhaul, repowers, generators, fuel and cooling systems, transmissions, shafts and propulsion equipment.

Diesel Engine Experience: Cummins, Volvo Penta, Caterpillar, John Deere and other marine engines.

Phone: 206-939-3600

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Seattle, Ballard & Central Puget Sound

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Diesel Systems Services, Inc. — Seattle

Specialties: Mobile marine diesel service, diagnostics, maintenance.

Engine Experience: Detroit Diesel, Caterpillar, Cummins, MTU, Volvo Penta, Hino, Yanmar, John Deere and others.

Engine Survey / Inspection Available: Yes — mechanical surveys are specifically offered.

Phone: 425-788-3776

The company services vessels throughout Puget Sound, including Seattle, Tacoma, Everett, Anacortes, Bellingham, Bainbridge Island, Kitsap County and the San Juan Islands.

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Hatton Power & Propulsion — Seattle / Ballard

Specialties: Marine diesel diagnostics and repair, propulsion systems, engine maintenance, repowers, marine generators and turbocharger rebuilding.

Engine Experience: Cummins, Yanmar, Scania, John Deere and other marine diesel engines.

Phone: 206-283-5501

Hatton provides both shop and mobile marine-engine service throughout Puget Sound and beyond.

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Radtke Marine, Inc. — Seattle / Ballard

Specialties: Diesel-engine troubleshooting, repair, component rebuilding, engine overhauls, parts and technical support.

Engine Brands: Caterpillar, Cummins, John Deere and Mitsubishi; overhaul experience also includes Detroit Diesel.

Engine Survey / Inspection Available: Yes — Radtke specifically advertises engine surveys.

Phone: 206-789-5850

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MSHS Pacific Power Group — Salmon Bay, Seattle

Specialties: Marine diesel diagnostics, maintenance, repair, overhaul, propulsion systems, engine electronics, component rebuilding and mobile field service.

Engine Brands: Authorized service support includes mtu, Volvo Penta and Detroit Diesel; additional company facilities support Yanmar and other commercial diesel platforms.

Engine Survey / Inspection Available: Yes — engine surveys and diagnostics are specifically listed by the Salmon Bay facility.

Phone: 206-888-9959

Specializing in larger yachts, commercial vessels and technically complex diesel installations.

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Nautix Marine — Seattle / Mobile Puget Sound Service

Specialties: Mobile diesel diagnostics, preventive maintenance, fuel and cooling systems, electrical/charging systems and diesel repairs.

Engine Survey / Inspection Available: Yes — dedicated pre-purchase diesel engine inspections including oil sampling, cooling and fuel-system evaluation, electrical diagnostics and photo documentation.

Service Area: Approximately 50 miles from Seattle.

Website: Nautix Marine

Nautix operates as a mobile diesel service and comes directly to vessels at docks, marinas, yards and moorings.

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Kitsap Peninsula, Bremerton & Hood Canal

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Salty Boys Boat Works — Bremerton / Mobile Puget Sound

Specialties: Mobile marine diesel repair, maintenance, repowers and vessel systems.

Diesel Brands: Yanmar certified service; Nanni Marine diesel engines; Cox diesel outboards.

Phone: 206-497-7258

Service areas include Bremerton, Port Orchard, Poulsbo, Bainbridge Island, Hood Canal, Port Townsend and portions of South Puget Sound.

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Tacoma, Fife & South Puget Sound

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Tacoma Diesel & Equipment — Fife / Tacoma

Specialties: Marine diesel maintenance, diagnostics, repair, engine overhaul, repowers, dynamometer testing, sea trials, generators and propulsion equipment.

Engine Brands: Caterpillar, Cummins, Detroit Diesel, Perkins, Yanmar and other marine diesel engines; transmission support includes major marine-gear manufacturers.

Phone: 253-922-8171

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DC Diesel Marine Service — Western Washington

Engine Specialty: Detroit Diesel, with service available for numerous other diesel makes.

Engine Survey / Inspection Available: Yes — engine surveys are specifically offered.

Contact: Dave DeBord
Phone: 206-450-7057

DC Diesel provides mobile service throughout the Seattle area and Western Washington and works on recreational, commercial and fishing vessels.

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Independent Diesel Engine & Mechanical Surveys

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Racer Machine Corporation — Pacific Northwest

Mechanical Surveyor: Race Turner

Specialties: Pre-purchase mechanical inspections, marine diesel engines, propulsion machinery, hydraulic systems, troubleshooting, failure analysis and equipment consulting.

Engine Survey / Inspection Available: Yes — mechanical inspections are a primary focus of the business.

Service Area: Washington coast, Puget Sound, Seattle, Gig Harbor, Anacortes, Vancouver and Portland areas.

Phone: 360-560-1954

Racer Machine Corporation states that its recent pleasure-craft work has focused on pre-sale mechanical inspections and that its primary survey focus is mechanical components.

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Before Hiring a Marine Diesel Technician:

Engine brands, dealer authorizations, personnel and service areas can change. Vessel owners should confirm that a provider has current experience with the specific engine make and model involved and verify whether the requested work will be performed by a factory-trained or manufacturer-authorized technician when that distinction is important.

For a vessel purchase, consider arranging a dedicated mechanical/engine inspection in addition to the general condition-and-value marine survey.

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Directory last reviewed: August 2026