Rebuilt MG540 Transmissions Available for Immediate Purchase

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When it comes to marine propulsion, the Twin Disc MG540 rebuilt marine transmission stands out for its unmatched durability, exceptional performance, and versatile gear ratios. Built to handle horsepower ranging from 680 to 1,600 hp (507 to 1,193 kW), the MG540 is engineered for high-load, continuous operations across a range of commercial and industrial marine applications. Now, these meticulously rebuilt units are in stock and ready for immediate sale, offering your vessel a seamless upgrade or replacement solution.

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Twin Disc MG540 Ratios for Sale

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Our rebuilt Twin Disc MG540 transmissions are available in a comprehensive range of gear ratios, ensuring you can select the configuration that perfectly matches your vessel’s specific performance requirements. Each rebuilt unit is thoroughly inspected, precision-machined, and tested for optimal functionality, and is available for sale.

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• Twin Disc MG540 Ratio 2.26:1 (For Sale)
  Ideal for high-speed vessels, performance cruisers, and pleasure craft requiring rapid acceleration and agile handling. This ratio is optimized for responsive operation in patrol boats, water taxis, and high-speed service vessels.

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• Twin Disc MG540 Ratio 2.56:1 (For Sale)
  A balanced configuration for vessels needing a blend of speed and torque. Suitable for fishing boats, patrol craft, and mid-sized commercial vessels, this ratio supports efficient, flexible operations.

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• Twin Disc MG540 Ratio 3.26:1 (For Sale)
  Perfect for workboats, offshore service vessels, and versatile commercial operations requiring consistent performance across varying conditions. This ratio supports balanced torque and propulsion power.

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• Twin Disc MG540 Ratio 3.95:1 (For Sale)
  Engineered for heavy-duty applications where continuous torque is critical. This ratio is ideal for tugboats, trawlers, and workboats operating under constant or variable loads.

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• Twin Disc MG540 Ratio 4.60:1 (For Sale)
  Designed for high-torque marine applications, including towboats, dredgers, and large service vessels. The 4.60:1 ratio delivers robust pulling power and operational resilience.

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• Twin Disc MG540 Ratio 5.17:1 (For Sale)
  For extreme torque demands, this ratio supports high-drag operations in commercial marine environments, including ocean freighters, offshore supply vessels, and heavy towing applications.

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• Twin Disc MG540 Ratio 6.18:1 (For Sale)
  Enhanced pulling power for vessels operating in demanding environments. Ideal for harbor tugs, anchor handlers, and high-load service vessels requiring sustained torque transfer.

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• Twin Disc MG540 Ratio 7.00:1 (For Sale)
  Specifically designed for extreme marine applications, including ocean towing, large-scale barge handling, and specialized service operations where maximum torque is essential.

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• Twin Disc MG540 Ratio 9.13:1 (For Sale)
  The highest available ratio, delivering unparalleled torque capacity for vessels engaged in the most demanding applications, such as ocean freighters, offshore industrial vessels, and high-drag towing operations.

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Each of these ratios is available for immediate sale, ensuring you can equip your vessel with a rebuilt transmission tailored to its specific operational profile.

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Why Choose a Twin Disc MG540 Rebuilt Transmission for Sale?

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• Expertly Rebuilt to OEM Specifications: Each MG540 unit is disassembled, thoroughly cleaned, inspected, and rebuilt to meet or exceed original performance standards. Components including gears, bearings, clutches, and seals are replaced or refurbished as needed.
  

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• All Ratios Available for Sale: Whether you need high-speed responsiveness or high-torque capability, we stock and sell all MG540 gear ratios, ensuring your vessel receives a perfect match.
  

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• High Power Handling: Designed for engines ranging from 680 to 1,600 hp, the MG540 accommodates a wide array of vessel types and operational conditions.
  

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• Durability and Performance: Carburized, hardened, and precision-ground gears ensure quiet, reliable performance. Optional heat exchanger kits offer superior cooling under continuous heavy loads.
  

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• Service Classification Support: Built to handle continuous duty (workboat), intermediate duty (commercial and pleasure craft), and maximum rating for short-interval high-performance use.
  

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• Immediate Availability: With rebuilt units in stock, you can reduce downtime and ensure uninterrupted vessel operations.
  

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Specifications and Technical Details

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• Model: Twin Disc MG540
• Horsepower Range: 680 to 1,600 hp (507 to 1,193 kW)
• Weight: Varies by housing (SAE 0 or SAE 00), up to 2,087 kg (4,600 lbs)
• Oil Capacity: Designed for extended operation with optimized lubrication
• Operating Pressure: Consistent high-pressure operation for reliable clutch engagement
• Gear Design: Carburized, hardened, precision-ground for quiet operation and durability
• Cooling Options: Heat exchanger kits available for continuous operation in demanding environments
• Housing Options: SAE 0 and SAE 00 configurations for compatibility with various engine installations
• Service Classifications: Continuous duty, intermediate duty, and pleasure craft (maximum rating)

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Engine Compatibility for the Twin Disc MG540

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The Twin Disc MG540 rebuilt marine transmission is engineered for high-output marine diesel engines, delivering the robust torque and power transfer needed for vessels operating in the most demanding marine environments. With a power handling capacity of up to 1,600 horsepower, the MG540 is perfectly suited for integration with powerful engines from leading manufacturers, including Caterpillar, Cummins, MTU, and Detroit Diesel. Below is a detailed list of compatible engine models that reflect the MG540’s substantial capabilities:

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Caterpillar Marine Engines

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Caterpillar is known for producing durable and high-powered engines for a range of marine applications. The MG540 pairs seamlessly with models designed for commercial and offshore use:

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• Caterpillar C32 ACERT – Provides up to 1,800 hp, making it ideal for high-speed ferries, patrol vessels, and large yachts that demand both power and speed.
• Caterpillar 3512 – Offers between 850 and 1,450 hp, commonly used in heavy-duty applications such as dredgers, supply boats, and trawlers.
• Caterpillar 3516 – Delivers 1,200 to 2,000 hp, a top choice for large commercial vessels, cargo ships, and offshore platforms where continuous power is critical.

These engines, combined with the MG540’s robust gear ratios and torque capacity, ensure reliable performance in the most challenging conditions.

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Cummins Marine Engines

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Cummins engines are celebrated for their reliability and adaptability in marine applications. The MG540 matches particularly well with Cummins’ high-horsepower models:

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• Cummins KTA38 – Produces 680–1,250 hp, ideal for dredgers, offshore support vessels, and heavy-duty tugs.
• Cummins KTA50 – Delivers up to 1,800 hp, designed for high-torque marine applications such as ocean-going supply ships and large-scale towboats.
• Cummins QSK50 – Offers a range of 1,400–1,800 hp, combining durability with high-output performance for heavy-duty workboats and offshore service vessels.

With these engine models, the MG540 ensures consistent, high-capacity power transfer, supporting critical marine operations.

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Detroit Diesel Marine Engines

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Detroit Diesel engines have long been trusted for their durability and performance in marine environments. The MG540’s robust design supports integration with high-horsepower Detroit Diesel models:

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• Detroit Diesel 12V149 – Provides up to 1,060 hp, commonly used in large fishing boats, offshore support vessels, and workboats.
• Detroit Diesel 16V149 – Delivers between 1,200–1,800 hp, ideal for heavy-duty tugs, ocean-going freighters, and industrial marine applications.

These pairings ensure smooth, reliable power transfer for commercial vessels requiring continuous operation in harsh conditions.

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MTU Marine Engines

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MTU engines are synonymous with high-performance marine propulsion. The MG540 is ideally matched with these models, renowned for their power and efficiency:

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• MTU 12V 4000 M63/M65 – Delivers 1,800–2,250 hp, perfectly suited for fast ferries, large offshore vessels, and high-speed service vessels.
• MTU 16V 4000 M63/M65 – Provides 2,400–3,000 hp, making it an excellent choice for large-scale commercial vessels, cruise ships, and ocean freighters.

Pairing the MG540 with MTU engines delivers exceptional power density and propulsion efficiency, even under continuous load.

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Summary of Engine Compatibility

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The Twin Disc MG540 rebuilt marine transmission is designed for engines that deliver serious horsepower and continuous torque. Unlike smaller transmissions, the MG540 is intended for the biggest, most demanding marine engines, supporting vessels such as:

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• Offshore supply vessels
• Tugboats and towboats
• Dredgers
• Large commercial fishing boats
• Ferries and cruise ships
• Small ocean freighters and cargo vessels

Each rebuilt MG540 unit is rigorously tested to ensure seamless compatibility with these engines, delivering high-torque performance and reliability that operators can trust.

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Service Classifications

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• Continuous Duty (Workboat): For vessels operating continuously at full load, including tugs, supply boats, ferries, and ocean freighters.
• Intermediate Duty: For commercial vessels operating at full power with intermittent reduced load periods, such as fishing vessels, pilot boats, and patrol craft.
• Pleasure Craft (Maximum Rating): Designed for vessels operating at high power for short intervals, including sportsfishers, high-speed cruisers, and performance yachts.
  

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Duty Classification Performance Information for the Twin Disc MG540

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The Twin Disc MG540 rebuilt marine transmission offers a robust and flexible solution for a wide variety of high-power marine applications. The transmission’s performance is detailed below, organized by SAE housing specification and duty classification. Understanding both the performance data and the role of SAE housing ensures a complete understanding of how the MG540 can be matched to specific vessels and operational profiles.

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SAE 0 Housing Performance

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Continuous Duty (Workboat Applications)

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Ratio	Input Speed (RPM)	Maximum Power (kW)
2.26:1	1800	746
2.56:1	1800	746
3.26:1	1800	746
3.95:1	1800	746
4.60:1	1800	746
5.17:1	1800	746
6.18:1	1800	746
7.00:1	1800	746
9.13:1	1800	746

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Intermediate Duty (and Pleasure Craft Service)

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Ratio	Input Speed (RPM)	Maximum Power (kW)
2.26:1	2100	895
2.56:1	2100	895
3.26:1	2100	895
3.95:1	2100	895
4.60:1	2100	895
5.17:1	2100	895
6.18:1	2100	895
7.00:1	2100	895
9.13:1	2100	895

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Maximum Rating (Short-Interval Extreme Performance Use)

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Ratio	Input Speed (RPM)	Maximum Power (kW)
2.26:1	2300	1130
2.56:1	2300	1130
3.26:1	2300	1130
3.95:1	2300	1130
4.60:1	2300	1130
5.17:1	2300	1130
6.18:1	2300	1130
7.00:1	2300	1130
9.13:1	2300	1130

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Important Disclaimer

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The performance charts and information provided are intended as general guidelines. Twin Disc and the transmission manufacturer assume no responsibility for system-related failures or incompatibilities arising from improper selection, installation, or maintenance of the transmission within the overall propulsion system. Operators and installers are encouraged to consult with marine engineering professionals to ensure compatibility with specific engines, vessels, and operational conditions.

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Understanding SAE Housing for the Twin Disc MG540

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SAE housing refers to the standardized dimensions and configurations established by the Society of Automotive Engineers (SAE). These standards ensure precise and reliable mating between engines and transmissions across different manufacturers and applications. In the context of the Twin Disc MG540, the SAE housing classification plays a pivotal role in determining compatibility with high-output marine diesel engines.

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SAE Housing Classifications – Overview

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The MG540 is designed to accommodate two key housing sizes:

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• SAE 0 housing
• SAE 00 housing

Each classification specifies the physical interface dimensions—including bolt circle diameters, bolt hole sizes, pilot diameter, and depth—ensuring a precise connection between the engine flywheel housing and the transmission’s mounting flange.

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SAE 0 Housing – Detailed Information

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• Bolt Circle Diameter: Approximately 533.4 mm (21.0 inches)
• Pilot Diameter: 314.3 mm (12.38 inches)
• Common Applications: Typically used for high-power engines in the range of 600 to 1,200 horsepower, such as the Caterpillar C32 ACERT, Cummins KTA38, and similar.
• Real-World Use: SAE 0 housing provides a secure, standardized mounting interface, simplifying the integration of the MG540 with engines in offshore supply vessels, large fishing boats, and workboats. It balances the need for high torque transfer with manageable transmission dimensions.
  

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SAE 00 Housing – Detailed Information

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• Bolt Circle Diameter: Approximately 711.2 mm (28.0 inches)
  

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• Pilot Diameter: 508 mm (20.0 inches)
  

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• Common Applications: Designed for extremely high-output engines (typically 1,200 to 2,000+ horsepower), such as the Caterpillar 3516, Cummins QSK50, and MTU 16V4000 series.
  

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• Real-World Use: SAE 00 housing accommodates engines requiring a larger and more robust mounting interface. Its increased dimensions support greater torque loads and help distribute mechanical stresses more effectively, making it ideal for ocean freighters, large tugs, dredgers, and offshore platforms.
  

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Why SAE Housing Matters

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SAE housing standards play a crucial role in marine engineering by ensuring:

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• Interchangeability: Transmissions and engines from different manufacturers can be seamlessly integrated without the need for custom adaptors or modifications.
  

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• Simplified Maintenance: Standardized mounting patterns and dimensions streamline the installation, replacement, and service processes, reducing vessel downtime.
  

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• Enhanced Reliability: Precise, engineered interfaces help maintain alignment between the engine and transmission shafts, reducing torsional vibration, wear, and potential for mechanical failure.
  

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Application in Marine Environments

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The Twin Disc MG540 leverages SAE housing standardization to provide flexibility and reliability in high-power marine installations:

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• SAE 0 housing is commonly used in high-torque applications with engines like the Caterpillar C32 ACERT (up to 1,800 hp) or Cummins KTA38, offering robust performance while maintaining manageable size for workboats and supply vessels.
  

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• SAE 00 housing is essential for extreme-power engines such as the MTU 16V4000 series or Caterpillar 3516, which power vessels operating in the most demanding conditions. This includes heavy-duty tugs, large offshore support vessels, dredgers, and ocean freighters, where continuous high-load performance is required.
  

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Key Takeaways

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• The Twin Disc MG540 is available in both SAE 0 and SAE 00 housing configurations, ensuring compatibility with a wide range of marine diesel engines.
• SAE 0 housing supports high-horsepower engines for medium- to heavy-duty operations, while SAE 00 housing accommodates the largest engines in the marine industry.
• This standardization enhances flexibility, reduces installation complexity, and supports long-term reliability.
  

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Specifications and Installation Information for the Twin Disc MG540

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The Twin Disc MG540 rebuilt marine transmission is available in two SAE housing configurations—SAE 0 and SAE 00—designed for seamless integration with high-horsepower marine engines. Below are the detailed specifications, including all available gear ratios and installation references.

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SAE 0 Housing Specifications

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• Model: MG540 (SAE 0 Housing)
• SAE Housing: SAE 0
• Available Ratios:
  • 2.26:1
  • 2.56:1
  • 3.26:1
  • 3.95:1
  • 4.60:1
  • 5.17:1
  • 6.18:1
  • 7.00:1
  • 9.13:1
• Approximate Dry Weight: 2,065 kg (4,550 lbs)
• Certified Print for Installation: Drawing Number X9882-A

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SAE 00 Housing Specifications

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• Model: MG540 (SAE 00 Housing)
• SAE Housing: SAE 00
• Available Ratios:
  • 2.26:1
  • 2.56:1
  • 3.26:1
  • 3.95:1
  • 4.60:1
  • 5.17:1
  • 6.18:1
  • 7.00:1
  • 9.13:1
• Approximate Dry Weight: 2,087 kg (4,600 lbs)
• Maximum Input RPM: 1,650 RPM (continuous) / 2,300 RPM (intermittent)
• Certified Print for Installation: Drawing Number X9942-A

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Key Installation Notes

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• Certified Prints: Always refer to the provided certified drawings to ensure accurate alignment, torque application, and component fitment. This ensures the transmission is properly mounted to the engine’s flywheel housing.
  

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• Housing Selection:
  

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  • SAE 0 housing is typically used for engines in the 600–1,200 hp range, such as the Caterpillar C32 ACERT or Cummins KTA38, balancing power capacity with manageable transmission dimensions.
    

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  • SAE 00 housing is designed for engines exceeding 1,200 hp, including models like the Caterpillar 3516 or MTU 16V4000, offering a robust mounting interface for high torque and continuous operation.
    

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• Dry Weight Considerations: Proper lifting and support equipment is necessary to handle the significant dry weights of the MG540, ensuring safe installation and maintenance.
  

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• Maximum Input RPM: Be aware of the rated maximum input speeds to prevent over-revving and potential damage during high-speed operation.
  

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Conclusion – Ready for Your Vessel

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The Twin Disc MG540 rebuilt marine transmission, with its comprehensive range of ratios and compatibility with high-output diesel engines, is your solution for high-performance, reliable marine propulsion. Whether you’re upgrading, replacing, or outfitting a new vessel, we have the perfect MG540 ratio for sale to meet your operational demands. Backed by a meticulous rebuild process and immediate availability, the MG540 ensures your vessel will be ready for the most demanding marine environments.

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