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Westerbeke 11.5 BTD Marine Diesel Generators


Westerbeke 11.5 BTD Marine Diesel Generators
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Westerbeke 12C TWO Marine Diesel Engine

11.5 kW

More power, less size...
Quiet and Compact

     Running at 1800 RPM with tuned air intake silencer and 3-cylinder smoothness, the 11.5 BTD is powerfully quiet. The generator also features one of the smallest envelopes of any generator in its class.

11.5 BTD - Overview & Specifications

Cylinders: 3
Bore: 3.07 in.
Stroke: 3.62 in.
Displacement: 80.43 cu. in.

Aspiration: Natural

Length: 31.50 in.
Width: 19.10 in.
Height: 24.00 in.
Weight: 513.00 lbs.


Precise Frequency Regulation
   Electronic governing provides instantaneous response as load is applied or removed from the generator. No dimming lights associated with mechanical governing speed fluctuation.
Powerful, Lightweight and Reliable
   The 11.5 BTD is powered by a naturally aspirated, industrial, 1.3 liter, engine specially engineered to operate in a hostile marine environment. 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 11.5 BTD is fresh water cooled and designed with easy access to servicing points. Individually removable top and side panel of the optional sound enclosure aid installation and routine 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 11.5 BTD 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

  • Electronic governing

  • 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

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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 11.5 BTD Specifications

Westerbeke 11.5 BTD Installation Drawings

Westerbeke 11.5 BTD Wiring Diagrams

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


This Page Last Updated January 11, 2018

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