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Westerbeke 12.5 BTDB Marine Diesel Generators


Westerbeke 12.5 BTDB Marine Diesel Generators
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Westerbeke 12C TWO Marine Diesel Engine

12.5 kW

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 12.5 BTDB is a smooth, quiet and compact diesel generator. The 12.5 BTDB also provides one of the best power to weight ratios of any generator in its class.

12.5 BTDB - Overview & Specifications

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.


Powerful, Lightweight and Reliable
   The 12.5 BTDB 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 12.5 BTDB 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 12.5 BTDB 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 Equipment

  • 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

Adobe Acrobat Reader is required to view the  files below.

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 such as Trans Atlantic Diesels

Westerbeke 12.5 BTDB Specifications

Westerbeke 12.5 BTDB Installation Drawings

Please be sure to visit our Used & Surplus page for great prices on Westerbeke Marine Diesel Engines.


This Page Last Updated January 18, 2016

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