Remanufactured Marine Engines

Shop remanufactured inboard marine engines, replacement boat engines, marine long blocks, and complete marine engine assemblies for recreational, commercial, and performance boating applications. Engines Factory supplies quality inboard marine engines for popular gasoline and diesel marine platforms used in fishing boats, cruisers, sport boats, workboats, and other marine vessels. Our marine engines are built to OEM specifications and available with warranty options, expert fitment assistance, competitive pricing, and nationwide shipping. Use the filters below to find the right inboard marine engine and request a quote today.

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    2000-Up GM Marine 6.2L 377 High Performance Fuel Injected 1-Piece Rear Seal 2-Bolt Main Remanufactured Long Block Engine
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    2000-Up GM Marine 6.2L 377 High Performance Fuel Injected 1-Piece Rear Seal 2-Bolt Main Remanufactured Long Block Engine

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    Remanufactured GM Marine 6.2L / 377 long block engine for 2000-Up applications. High Performance, Fuel Injected, 1-Piece Rear Seal, Roller Cam, 2-Bolt Main. Built for marine replacement use with professional fitment assistance and nationwide shipping. Request a quote today.
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    GM Marine 8.2L 502 High Performance Fuel Injected Gen V Gen VI Remanufactured Long Block Engine
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    GM Marine 8.2L 502 High Performance Fuel Injected Gen V Gen VI Remanufactured Long Block Engine

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    Remanufactured GM Marine 8.2L / 502 long block engine. High Performance, Fuel Injected, Gen V, Gen VI. Built for marine replacement use with professional fitment assistance and nationwide shipping. Request a quote today.
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    1996-2005 GM Marine 6.2L 383 High Performance Standard Rotation Remanufactured Long Block Engine
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    1996-2005 GM Marine 6.2L 383 High Performance Standard Rotation Remanufactured Long Block Engine

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    Remanufactured GM Marine 6.2L / 383 long block engine for 1996-2005 applications. Standard Rotation, High Performance. Built for marine replacement use with professional fitment assistance and nationwide shipping. Request a quote today.
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    1987-1995 GM Marine 6.2L 383 High Performance Standard Rotation Vortec Remanufactured Long Block Engine
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    1987-1995 GM Marine 6.2L 383 High Performance Standard Rotation Vortec Remanufactured Long Block Engine

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    Remanufactured GM Marine 6.2L / 383 long block engine for 1987-1995 applications. Standard Rotation, High Performance, Vortec, Roller Cam. Built for marine replacement use with professional fitment assistance and nationwide shipping. Request a quote today.
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    2004-2007 GM Marine 8.1L 496 Standard Output 4-Bolt Main Remanufactured Long Block Engine
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    2004-2007 GM Marine 8.1L 496 Standard Output 4-Bolt Main Remanufactured Long Block Engine

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    Remanufactured GM Marine 8.1L / 496 long block engine for 2004-2007 applications. Standard Output, 4-Bolt Main. Built for marine replacement use with professional fitment assistance and nationwide shipping. Request a quote today.
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    2004-2007 GM Marine 8.1L 496 High Performance High Output 4-Bolt Main Remanufactured Long Block Engine
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    2004-2007 GM Marine 8.1L 496 High Performance High Output 4-Bolt Main Remanufactured Long Block Engine

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    Remanufactured GM Marine 8.1L / 496 long block engine for 2004-2007 applications. High Performance, High Output, 4-Bolt Main. Built for marine replacement use with professional fitment assistance and nationwide shipping. Request a quote today.
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    1996-2003 GM Marine 7.4L 454 Standard Rotation Gen V Gen VI 4-Bolt Main Remanufactured Long Block Engine
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    1996-2003 GM Marine 7.4L 454 Standard Rotation Gen V Gen VI 4-Bolt Main Remanufactured Long Block Engine

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    Remanufactured GM Marine 7.4L / 454 long block engine for 1996-2003 applications. Standard Rotation, Gen V, Gen VI, 4-Bolt Main. Built for marine replacement use with professional fitment assistance and nationwide shipping. Request a quote today.
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    1996-2003 GM Marine 7.4L 454 Standard Rotation Fuel Injected Gen V Gen VI 4-Bolt Main Remanufactured Long Block Engine
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    1996-2003 GM Marine 7.4L 454 Standard Rotation Fuel Injected Gen V Gen VI 4-Bolt Main Remanufactured Long Block Engine

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    Remanufactured GM Marine 7.4L / 454 long block engine for 1996-2003 applications. Standard Rotation, Fuel Injected, Gen V, Gen VI, 4-Bolt Main. Built for marine replacement use with professional fitment assistance and nationwide shipping. Request a quote today.
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    1991-1997 GM Marine 7.4L 454 Reverse Rotation Fuel Injected 1-Piece Rear Seal Gen V Gen VI 4-Bolt Main Remanufactured Long Block Engine
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    1991-1997 GM Marine 7.4L 454 Reverse Rotation Fuel Injected 1-Piece Rear Seal Gen V Gen VI 4-Bolt Main Remanufactured Long Block Engine

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    Remanufactured GM Marine 7.4L / 454 long block engine for 1991-1997 applications. Reverse Rotation, Fuel Injected, 1-Piece Rear Seal, Flat Tappet, Gen V. Built for marine replacement use with professional fitment assistance and nationwide shipping. Request a quote today.
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    1991-1997 GM Marine 7.4L 454 Standard Rotation 1-Piece Rear Seal Gen V 4-Bolt Main Remanufactured Long Block Engine
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    1991-1997 GM Marine 7.4L 454 Standard Rotation 1-Piece Rear Seal Gen V 4-Bolt Main Remanufactured Long Block Engine

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    Remanufactured GM Marine 7.4L / 454 long block engine for 1991-1997 applications. Standard Rotation, 1-Piece Rear Seal, Flat Tappet, Gen V, 4-Bolt Main. Built for marine replacement use with professional fitment assistance and nationwide shipping. Request a quote today.
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    1973-1990 GM Marine 7.4L 454 Reverse Rotation 2-Piece Rear Seal Mark IV 2-Bolt Main Remanufactured Long Block Engine
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    1973-1990 GM Marine 7.4L 454 Reverse Rotation 2-Piece Rear Seal Mark IV 2-Bolt Main Remanufactured Long Block Engine

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    Remanufactured GM Marine 7.4L / 454 long block engine for 1973-1990 applications. Reverse Rotation, 2-Piece Rear Seal, Flat Tappet, Mark IV, 2-Bolt Main. Built for marine replacement use with professional fitment assistance and nationwide shipping. Request a quote today.
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    1973-1990 GM Marine 7.4L 454 Standard Rotation 2-Piece Rear Seal Mark IV 2-Bolt Main Remanufactured Long Block Engine
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    1973-1990 GM Marine 7.4L 454 Standard Rotation 2-Piece Rear Seal Mark IV 2-Bolt Main Remanufactured Long Block Engine

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    Remanufactured GM Marine 7.4L / 454 long block engine for 1973-1990 applications. Standard Rotation, 2-Piece Rear Seal, Flat Tappet, Mark IV, 2-Bolt Main. Built for marine replacement use with professional fitment assistance and nationwide shipping. Request a quote today.
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    2010-2014 GM Marine 6.0L 364 With Tinware Catalytic Converter Version Remanufactured Long Block Engine
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    2010-2014 GM Marine 6.0L 364 With Tinware Catalytic Converter Version Remanufactured Long Block Engine

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    Remanufactured GM Marine 6.0L / 364 long block engine for 2010-2014 applications. Catalytic Converter Version. Built for marine replacement use with professional fitment assistance and nationwide shipping. Request a quote today.
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    2005-Up GM Marine 5.7L 350 Fuel Injected 1-Piece Rear Seal With Tinware 2-Bolt Main Remanufactured Long Block Engine
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    2005-Up GM Marine 5.7L 350 Fuel Injected 1-Piece Rear Seal With Tinware 2-Bolt Main Remanufactured Long Block Engine

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    Remanufactured GM Marine 5.7L / 350 long block engine for 2005-Up applications. Fuel Injected, 1-Piece Rear Seal, Roller Cam, 2-Bolt Main. Built for marine replacement use with professional fitment assistance and nationwide shipping. Request a quote today.
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    1996-1997 GM Marine 5.7L 350 1-Piece Rear Seal With Tinware 2-Bolt Main Remanufactured Long Block Engine
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    1996-1997 GM Marine 5.7L 350 1-Piece Rear Seal With Tinware 2-Bolt Main Remanufactured Long Block Engine

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    Remanufactured GM Marine 5.7L / 350 long block engine for 1996-1997 applications. 1-Piece Rear Seal, Flat Tappet, 2-Bolt Main. Built for marine replacement use with professional fitment assistance and nationwide shipping. Request a quote today.
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    1996-2005 GM Marine 5.7L 350 1-Piece Rear Seal 2-Bolt Main Remanufactured Long Block Engine
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    1996-2005 GM Marine 5.7L 350 1-Piece Rear Seal 2-Bolt Main Remanufactured Long Block Engine

    In Stock
    Remanufactured GM Marine 5.7L / 350 long block engine for 1996-2005 applications. 1-Piece Rear Seal, Roller Cam, 2-Bolt Main. Built for marine replacement use with professional fitment assistance and nationwide shipping. Request a quote today.
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