ATK Engines DMX1 Chevrolet 4.3L Marine Long Block Engine – 230 HP Standard Rotation with Roller Cam Balance Shaft

Description

The ATK Engines DMX1 is a remanufactured Chevrolet 4.3L/262 cubic inch marine long block engineered for 2007-2011 GM marine applications. This 230 horsepower marine engine uses a cast iron block and cylinder heads along with a balance shaft and roller cam valvetrain for smoother marine operation and dependable throttle response. Standard rotation configuration and OEM-style marine architecture simplify replacement on compatible GM-powered boats. || Designed for sterndrive and inboard marine setups, the DMX1 supports repower projects requiring OE-compatible fitment for late-model 4.3L GM marine platforms. The engine includes marine-calibrated internals and dual knock sensor provisions to match factory electronics and ignition systems. Castings #12600234 and #12557113/12558114 help ensure compatibility with specific marine configurations. || ATK remanufactures the DMX1 using marine-grade components intended for long-term durability in harsh boating environments. The engine ships in protective packaging with installation documentation and is suited for recreational cruisers, fishing boats, and marine service replacements needing a direct-fit 4.3L V6 marine long block.