12.5 BTDB

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

Length: 35.10 in.
Width: 19.20 in.
Height: 24.00 in.
Weight: 561.00 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.

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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	10/1/2012

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Westerbeke Superseded Parts Listing August 2015	8/1/2015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
BT GENERATORS A C ELECTRICAL TROUBLESHOOTING GUIDE	3/1/2016

Diagnostic Software

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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 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
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:	5/3/2013
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	9/17/2010
Parts Bulletin 2008-4: Paint Storage Applies To: All Models	11/24/2008
Parts Bulletin 2007-2: Fuel Filter 030200 Applies To:	4/25/2007
Service Bulletin #250: BT Generators	4/28/2006
Service Bulletin #242: Manufacture Date Code	8/20/2004
Service Bulletin #238: Fuel Pump Inlet Filter Part Number 048076	2/28/2003
Service Bulletin #125: Oil Pressure Switches	8/14/1983

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