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15.0 BTDC

Cylinders: 4
Bore: 3.07 in.
Stroke: 3.62 in.
Displacement: 107.27 cu. in.
Aspiration: Natural

Length: 35.00 in.
Width: 19.00 in.
Height: 24.00 in.
Weight: 569.00 lbs.

Sound Guard Enclosures

The truly "quiet breed" of reliable power....

Quiet and Compact

Designed by Westerbeke, the Company that pioneered the truly "quiet breed" of generators, the 4-cylinder 15.0 BTDC is a smooth, quiet and compact diesel generator. The 15.0 BTDC also provides one of the best power to weight ratios of any generator in its class.

Powerful, Lightweight and Reliable
The 15 BTDC is engineered to operate in a hostile marine environment. It is designed and built using experience gained in supplying generators to the United States Navy and Coast Guard. Powerful but lightweight, it is economical to operate and designed to run at a slow 1800 RPM for longer life.

Easy Operation and Maintenance
To minimize engine maintenance, the 15 BTDC is fresh water cooled and equipped with a simple control system rather than complex, troublesome, electronic components.  Easy access to all servicing points and individually removable top and side panels of the optional sound enclosure allow easy installation and maintenance.

Full Torque, Power Take-Off Interface
A customer sourced, electric clutch and hydraulic pump can be mounted to the full torque, power take-off interface for use with such items as bow thrusters, compressors, winches and "take-home" systems.

Five Year Limited Warranty
The 15 BTDC is backed by Westerbeke's 5-year limited warranty. 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 unequaled after sales support.

Standard Features

  • Instrument panel and safety stop switch
  • Remote start-stop plug-in connection
  • Extra oil pressure switch for remote signal or control functions
  • Safety shut-downs – high coolant temperature, low oil pressure, high exhaust temperature.
  • A.C. Circuit Breaker installed (single phase)
  • 50 amp alternator
  • Power take-off interface
  • Self-bleeding fuel system
  • Fresh water cooling and coolant recovery tank
  • 45° water injected exhaust elbow
  • Gear-driven raw water pump
  • Tuned air intake silencer
  • Vibration mounts – fail safe rubber type
  • Lube oil drain hose and drip tray
  • Oil fill – top and side
  • Belt guard
  • Operator’s manual and parts list
  • EPA, CARB & CE compliant

Optional Equipment

  • Remote start-stop panel
  • 15' & 30 connectable panel ext. harness (up to 60'/18.3m)
  • Dual station engine instrument panel with senders
  • Ship shore switch
  • Power takeoff adapter
  • Fuel filter/water separator
  • Hydro hush 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
  • Sound Guard sound enclosure

Optional 15 BTDC Sound Guard SST
The optional Sound Guard SST enclosure provides optimum silencing for the generator. Ruggedly constructed with stainless steel frame and powder coated aluminim panels; the Sound Guard SST also provides optimum corrosion resistance.  All 5 panels removable for easy servicing and maintenance.





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 1/1/2011
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
  Operator's Manual 044800 12/1/2014
  Parts Manual 047631 10/1/2002
  Technical Manual 045100 N/A
Guides (Troubleshooting)
Document Name Publication Date
Diagrams (Wiring, Installation)
Document Name Publication Date
  Wiring Diagram 044927 3/24/2009
  Wiring Diagram 044927 Revision A 3/24/2009
  Wiring Diagram 044927 Revision B 3/24/2009
  Wiring Diagram 046299 12/12/2008
  Wiring Diagram 046299 Revision A 12/12/2008
  Wiring Diagram 044735 12/12/2008
  Wiring Diagram 044735 Revision A 12/12/2008
  Wiring Diagram 044735 Revision B 12/12/2008
  Wiring Diagram 043388 12/12/2008
  Wiring Diagram 043388 Revision A 12/12/2008
  Wiring Diagram 043647 12/12/2008
  Wiring Diagram 043647 Revision A 12/12/2008
  Wiring Diagram 043647 Revision B 12/12/2008
  Wiring Diagram 044970 12/12/2008
  Wiring Diagram 044970 Revision B 12/12/2008
  Wiring Diagram 044807 12/12/2008
  Wiring Diagram 044807 12/12/2008
  Wiring Diagram 044969 12/12/2008
  Installation Drawing 44196 7/14/1999
Bulletins (Service, Parts, Product Recalls)
Document Name Publication Date
  Parts Bulletin 2013-2: Piston and Rings Change

Applies To:

  Parts Bulletin 2009-8 REVISED: Air Intake Filter Housing P/N 044723

Applies To: 35C/35D Three, 8.0BTDA/10.0 BTDA, 12.5 BTDB and 15.0 BTDC

  Parts Bulletin 2008-4: Paint Storage

Applies To: All Models

  Parts Bulletin 2007-2: Fuel Filter 030200

Applies To:

  Service Bulletin #250: BT Generators

  Service Bulletin #242: Manufacture Date Code

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

  Service Bulletin #125: Oil Pressure Switches





Buy and View Parts Below : Click each image for a larger view and detailed list of the parts for that section. If images do not appear under a "Complete Parts Lists" heading, please scroll down to access the parts related information available for this model.


Download Parts Documentation
Document Name Publication Date
  Parts Manual 047631 10/1/2002
Superseded Parts List
Document Name Publication Date
  Westerbeke Superseded Parts Listing August 2015 8/1/2015