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30C Three *For Export Only

Cylinders: 3
Bore: 2.99 in.
Stroke: 2.76 in.
Displacement: 58.09 cu. in.
Aspiration: Natural

Length: 29.30 in.
Width: 20.00 in.
Height: 20.40 in.
Weight: 274.00 lbs.

IMPORTANT NOTE: This engine is for export only and cannot be shipped within the United States

Three cylinder, four-cycle smoothness...

Lightweight and Compact
Designed by Westerbeke, pioneers in lightweight marine diesel engines, the 30C Three is a compact three-cylinder engine perfect for difficult installations. Weighing in at only 274 pounds, the 30C Three provides a power to weight ratio to be envied while requiring modest engine room space.

Powerful and Reliable
The 30C Three is specially engineered to operate in a hostile marine environment. It is designed and built using experience gained in supplying over 1,100 whale boat engines to the United States Navy. The greater piston Bore of the 30C Three delivers more power without sacrificing smooth and quiet operation.

Easy Operation and Maintenance
To minimize engine maintenance, the 30C Three is fresh water cooled and equipped with a simple control system. Easy access to all servicing points and a self-bleeding fuel system allows easy installation and routine maintenance.

Full Engine Instrumentation Option
Westerbeke offers an optional admiral panel. The admiral panel includes, tachometer, hour meter, voltmeter, water temperature, and oil pressure guage. Westerbeke also offers an optional captain panel with tachometer, hour meter, and warning lights.

The Name You Can Trust
The presence of Westerbeke in over 65 countries around the world provides customers with easy access to parts, service and technical support worldwide. Established in 1937, Westerbeke is committed to providing its customers with quality products and unequalled after sales support.

Standard Equipment
  • Fresh water cooling
  • Engine pre-wired to plug-in connector
  • Circuit breaker protected electrical system
  • Self-bleeding fuel system
  • 12 volt 50 amp battery charging alternator
  • Domestic hot water connections
  • Coolant recovery tank
  • Throttle, stop, and shift control brackets
  • Low oil pressure and high water temperature alarms
  • Gear-driven raw water pump
  • Lube oil cooler in fresh water system


  • Short profile marine gear with 2.47:1 reduction
  • Glow plug cold starting aid
  • Four point adjustable flex mounts - fail-safe rubber type
  • Mounting centers - 14.56"
  • Lube oil drain hose
  • Gear oil cooler
  • Oil fill - Top and service side
  • Flexible fuel supply and return connector
  • Operator’s Manual and Parts List
  • Tuned air intake silence
Optional Equipment
  • Captain panel with alarm (tachometer with lights)
  • Admiral panel with alarms (tachometer with gauges)
  • Dual station senders
  • Other gear ratios - Consult local Distributor
  • Remote expansion tank
  • Fuel filter/water separator
  • Muffler and fittings
  • "A" on board spare parts kit
  • "B" extended cruising spare parts kit
  • Anti-siphon valve for overboard cooling discharge water
  • Technical Manual
  • Exhaust connection (water injected 90°, 45° elbows & riser)
  • Propeller shaft couplings (rigid/flexible)




Technical Documents

Important Note: Technical information is provided on our website for your reference and convenience. Westerbeke recommends that your engine, generator or climate control system is serviced and/or installed only by an authorized Westerbeke distributor or dealer. Click here to locate the Master Distributor or Dealer for your area.

Advanced Specifications
Document Name Publication Date
  Advanced Specifications 8/1/2010
Manuals (Operators, Parts, Technical, Installation)
Document Name Publication Date
  Parts Manual 037115 4/1/2018
  Installation Manual - Marine Engines & Generators 6/1/2016
  Westerbeke Superseded Parts Listing August 2015 8/1/2015
  Operator's Manual 036906 1/1/2011
  Parts Callout Drawing 54706 7/6/2010
  Technical Manual 037600 N/A
Guides (Troubleshooting)
No matching records found
Diagnostic Software
No matching records found
Diagrams (Wiring, Installation)
Document Name Publication Date
  Wiring Diagram 039144 Revision N 8/7/2008
  Installation Drawing 54873 N/A
Bulletins (Service, Parts, Product Recalls)
Document Name Publication Date
  Parts Bulletin 2010-2: Piston Wrist Pin Size Change

Applies To:

  Parts Bulletin 2008-4: Paint Storage

Applies To: All Models

  Parts Bulletin 2007-2: Fuel Filter 030200

Applies To:

  Service Bulletin #242: Manufacture Date Code

  Service Bulletin #239: Transmission Lubricant Change

  Service Bulletin #238: Fuel Pump Inlet Filter Part Number 048076

  Service Bulletin #155: Keyswitch

  Service Bulletin #136: Shift Lever

  Service Bulletin #125: Oil Pressure Switches