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4.9 TWG - 50 Hz

Cylinders: 3
Displacement: 65.00 cu. in.
Aspiration: Natural

Length: 37.50 in.
Width: 19.63 in.
Height: 24.50 in.
Weight: 510.00 lbs.

This model is no longer in production. Please select from the menu for parts information and technical documents such as advanced specifications, diagrams, manuals and product bulletins.




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 - Old Model 2/1/1984
Manuals (Operators, Parts, Technical, Installation)
Document Name Publication Date
  Installation Manual - Marine Engines & Generators 6/1/2016
  Westerbeke Superseded Parts Listing August 2015 8/1/2015
  Parts Manual 034630 9/1/1986
  Operator's Manual 033974 N/A
  Technical Manual 034645 N/A
Guides (Troubleshooting)
Document Name Publication Date
  WMD-TWG Troubleshooting Guide 3/3/2009
Diagrams (Wiring, Installation)
Document Name Publication Date
  Wiring Diagram 033680 3/24/2009
Bulletins (Service, Parts, Product Recalls)
Document Name Publication Date
  Service Bulletin #265: Ethanol Blended Gasoline

  Parts Bulletin 2008-4: Paint Storage

Applies To: All Models

  Service Advisory #2007-1: Carburetor Contamination

  Service Bulletin #251: E10 Ethanol Advisory

  Service Bulletin #242: Manufacture Date Code

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

  Service Bulletin #125: Oil Pressure Switches