Westerbeke Logo


30B Three

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.

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 3/1/2009
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  Westerbeke Superseded Parts Listing August 2015 8/1/2015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
  Technical Manual 037600 N/A
Guides (Troubleshooting)
No matching records found
Diagnostic Software
No matching records found
Diagrams (Wiring, Installation)
Document Name Publication Date
  039144 Revision M 3/2/2009
  Wiring Diagram 039144 Revision J 12/12/2008
  Wiring Diagram 039144 Revision K 12/12/2008
  Wiring Diagram 039144 Revision L 12/12/2008
  Wiring Diagram 039144 Revision N 8/7/2008
  Installation Drawing 46484 N/A
Bulletins (Service, Parts, Product Recalls)
Document Name Publication Date
  Parts Bulletin 2012-2: BW7 Transmission

Applies To: 20B Two, W 27, W 33, 30B Three, 35D Three, 35E Three, 44B Four

  Parts Bulletin 2012-1 BW7 and JS Transmission

Applies To: 20B Two, 30B Three, 35B Three, 35C Three, 35D Three, 38B Four, 42B Four, 44A Four

  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