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3.5 SBCG - 60 Hz low-CO

Cylinders: 2
Bore: 2.40 in.
Stroke: 2.36 in.
Displacement: 21.40 cu. in.
Aspiration: Natural

Length: 27.10 in.
Width: 16.90 in.
Height: 14.70 in.
Weight: 188.00 lbs.

Our Newest and Smallest Low-CO Generator!
Westerbeke, the first company to bring constant speed EFI generators to the marine market introduces another first: the smallest 3.5 kW low carbon monoxide generator available. The new 3.5 SBCG low-CO gasoline generator joins the already comprehensive line of Westerbeke low-CO gasoline generators that dramatically cut carbon monoxide emissions!

Multiport EFI and Electronic Speed Control
The new 3.5 SBCG low-CO gasoline generator features multiport electronic fuel injection (EFI). Multiport EFI provides optimum fuel efficiency, easy starting and improved reliability. In conjunction with multiport EFI, electronic speed control (via electronic governor) maintains the engine at a constant speed (precise frequency regulation) and eliminates “bogging down” when load is applied.

Smooth, Quiet & Compact
The 3.5 SBCG not only has one of the smallest envelopes available for a 3.5 kW marine gasoline generator, there is not another generator like it. Operating with 2-cylinders, the 3.5 SBCG is an extremely smooth running 3.5 kW.The unit also operates at a quiet, electronically controlled, 2200 RPM. So quiet, it doesn’t require a sound shield. No other generator in its class is quieter!

Lightweight & Powerful
Weighing in at only 188 pounds, the fresh water cooled 3.5 SBCG is powerful enough to run an air conditioner or water heater, etc.

Outstanding Product Support
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

  • Simple, "one-touch" start/stop control panel
    with running hour meter and LED warning annunciation lights
  • Multiport Electronic Fuel Injection
  • Electronic governing
  • Safety shut-downs-overspeed, underspeed, low oil pressure, high exhaust and coolant temperature
  • Fresh water cooling and coolant recovery tank  
  • A.C. Circuit breaker
  • Battery charger
  • 45° water injected exhaust elbow
  • Belt-driven, raw water pump
  • Vibration isolators
  • Lube oil drain hose
  • Belt guard
  • Operators' manual and parts list
  • EPA & CARB compliant
  • Meets U.S.C.G. regulation 33CFR-183


Optional Equipment

  • Remote start/stop panel with warning annunciation lights
  • 15' or 30' panel extension harness 
  • Ship-shore transfer switch
  • Hydro-hush muffler


  • Anti-siphon valve
  • Technical Manual
  • "A" on board spare parts kit
  • "B" extended cruising spare parts kit























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 4/1/2019
Manuals (Operators, Parts, Technical, Installation)
Document Name Publication Date
  Parts Manual 057432 12/1/2019
  Operator's Manual 054839 1/1/2018
  Installation Manual - Marine Engines & Generators 6/1/2016
  Westerbeke Superseded Parts Listing August 2015 8/1/2015
  Parts Callout Drawing 54840 2/13/2013
Guides (Troubleshooting)
No matching records found
Diagrams (Wiring, Installation)
Document Name Publication Date
  Wiring Diagram 054609 Revision C 8/14/2012
  Wiring Diagram 054609 Revision D 8/14/2012
  Wiring Diagram 054609 Revision B 11/9/2011
  Installation Drawing 55109 N/A
Bulletins (Service, Parts, Product Recalls)
Document Name Publication Date
  Service Bulletin #276: 3.0 BCG and 3.5 SBCG Belt Adjustment

  Parts Bulletin 2015-1: 3.5 SBCG Throttle Body and ECU Change

  Service Bulletin #268: PC Interface Cable Driver and latency timer modification

  Service Bulletin #267: AC Wiring Color Variation

  Service Bulletin #266: 3.5 SBCG Fuel Module Drain Plug

  Service Bulletin #265: Ethanol Blended Gasoline

  Parts Bulletin 2008-6: Fuel Filter 047006

Applies To:

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





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 Callout Drawing 54840 2/13/2013
  Parts Manual 057432 12/1/2019
Superseded Parts List
Document Name Publication Date
  Westerbeke Superseded Parts Listing August 2015 8/1/2015