6 Cylinder Engines For Sale

     1 - 28 of 41 Listings
    High/Low/Average
    About Engines

    Engines are a critical component in towable, stationary, portable, marine, and other types of generators that convert fuel into mechanical energy that the generator’s alternator then transforms into electric power.

    Read More (About Engines)
    1 - 28 of 41 Listings

    Sort

    Applied Filters

    Applied Filters
    keywords
    Attachment Category
    Fits-To Information
    Attachment Details
    Year
    serialNumberVIN
    Price
    ActivationUTCDateTime

    1 - 28 of 41 Listings

    RentalYard LogoRent
    All
    Options

    Sort
    Condition: Used
    Location: Lynwood, Illinois
    Condition: Rebuilt
    Location: Chicago, Illinois
    Seller: Diesel Sales
    Condition: New
    Location: Chicago, Illinois
    Seller: Diesel Sales
    Condition: New
    Location: Chicago, Illinois
    Seller: Diesel Sales
    Condition: New
    Location: Chicago, Illinois
    Seller: Diesel Sales
    Condition: Used
    Location: Thunder Bay, Ontario, Canada
    Seller: Iron House Equipment
    Call for price
    View Details
    Condition: Used
    Location: Balenhoek, Limburg, Belgium
    Seller: Hamofa Industrial Engines
    Call for price
    View Details
    Condition: Used
    Location: Nanclares De La Oca, Alava, Spain
    Seller: Maquinaria J. Aurteneche SL
    Call for price
    View Details
    Condition: New
    Location: Anzola Emilia, Bo, Italy
    Seller: CERVETTI TRACTOR S.r.l.
    Call for price
    View Details
    Condition: Used
    Location: Bembibre, Leon, Spain
    Seller: CHR Maquinaria
    Call for price
    View Details
    Condition: Used
    Location: Bembibre, Leon, Spain
    Seller: CHR Maquinaria
    Call for price
    View Details
    Condition: Used
    Location: Bembibre, Leon, Spain
    Seller: CHR Maquinaria
    Call for price
    View Details
    Condition: Used
    Location: Bembibre, Leon, Spain
    Seller: CHR Maquinaria
    Call for price
    View Details
    Condition: Used
    Location: Bembibre, Leon, Spain
    Seller: CHR Maquinaria
    Call for price
    View Details
    Condition: Used
    Location: Bembibre, Leon, Spain
    Seller: CHR Maquinaria
    Call for price
    View Details
    Condition: Used
    Location: Bembibre, Leon, Spain
    Seller: CHR Maquinaria
    Call for price
    View Details
    Condition: Used
    Location: Bembibre, Leon, Spain
    Seller: CHR Maquinaria
    Call for price
    View Details
    Condition: Used
    Location: Boé, Lot-Et-Garonne, France
    Seller: Duscio Matériel TP
    Call for price
    View Details
    Condition: Used
    Location: Boé, Lot-Et-Garonne, France
    Seller: Duscio Matériel TP
    Call for price
    View Details
    Condition: Used
    Location: Delmas, Mpumalanga, South Africa
    Call for price
    View Details
    Condition: Used
    Location: Hamont-Achel, Limburg, Belgium
    Seller: Hamofa Industrial Engines
    Condition: Used
    Location: Wellington, Somerset, United Kingdom
    Seller: Bussell Parts Ltd
    Condition: Used
    Location: Canton, Ohio
    Seller: Adelmans Truck Parts
    Quantity: 7
    Location: Parker, Colorado
    Seller: Big Bear Engine Company
    Condition: Used
    Location: Canton, Ohio
    Seller: Adelmans Truck Parts
    Condition: Used
    Location: Canton, Ohio
    Seller: Adelmans Truck Parts
    Condition: Used
    Location: Canton, Ohio
    Seller: Adelmans Truck Parts
    Condition: Used
    Location: Canton, Ohio
    Seller: Adelmans Truck Parts

    About Engines

    Generators provide reliable electric power for numerous applications, whether it’s running tools on an off-grid construction site or operating a household’s microwave during a power outage. The engine in a towable, stationary, power plant, marine, home standby, compact recreational, or portable generator converts fuel into mechanical energy that the unit’s alternator then converts into electric energy.


    2025 Caterpillar 3561B

    Generator engines differ in design, size, capacity, and fuel type. For example, while a compact recreational generator generally runs on gasoline, a power plant generator may utilize diesel, coal, natural gas, or another fuel type. Keeping the following considerations in mind when buying a generator can help.

    The Size Of The Engine

    A football fan using a small generator to power an HDTV at a tailgate party has far different power requirements than a factory owner running his operation with a power plant generator. The engine’s size impacts the generator’s power output. Larger engines typically generate more power, have more cylinders, and may require more effective cooling systems.

    Fuel Type Requirements

    There are generators on the market with engines that operate on various fuel types. Each offers advantages and disadvantages related to cost, efficiency, environmental conditions, and other factors.

    Gas

    • Widely available
    • Cheaper up front but less fuel-efficient vs. diesel
    • Good cold-weather starting capability
    • Commonly used in portable and compact recreational generators

    Diesel

    • Longer run times vs. gas
    • Typically longer-lasting engines
    • Lower risk of flammability vs. gas
    • Often used in towable, stationary, power plant, and marine generators

    Propane

    • Burns cleanly, lower emissions
    • Reliable starting in cold weather
    • Lower energy density vs. diesel
    • Used in stationary, towable, home standby, and portable generators

    Natural Gas

    • Produces very low emissions
    • Favorable fuel costs
    • Requires natural gas pipeline, so not much portability
    • Used in stationary, towable, power plant, home standby, and portable generators

    Additional Considerations For Generator Engines

    Along with engine size and fuel type, consider the following when choosing a generator engine.

    • Working environment. Differing applications may require specific engine characteristics; for example, a marine generator engine must withstand extreme heat, dampness, and other taxing conditions
    • Manufacturer. Caterpillar, Cummins, and Kubota are just some of the many reputable generator engine manufacturers
    • Maintenance. Determine the cost and level of ongoing engine maintenance required
    • Availability. Note the availability and cost of replacement parts
    • Starting method. Match the generator’s electric or recoil starting mechanism to your preference

    Where To Buy & Finance Generator Engines

    Explore PowerSystemsToday.com to find new and used generator engines for sale from industry-leading manufacturers such as Bobcat, Caterpillar, Cummins, Deutz, Isuzu, Komatsu, Kubota, and Perkins. The site offers for-sale listings for a wide variety of diesel, natural gas, 4-cylinder, and 6-cylinder engines, plus complete generator sets in natural gas, diesel, and other models.

    If you have already chosen the best engine for your needs, explore your generator and power systems with CurrencyFinance.