Description
TWIN DISC MG-5111 SC MARINE TRANSMISSION
The Twin Disc MG-5111 SC (Shallow Case) is a popular, medium-duty marine transmission designed to pair with marine diesel engines ranging from 400 to 800 horsepower, depending on the vessel’s duty cycle. Known for its compact “shallow case” footprint, it is widely used in pleasure craft, sportfishing boats, workboats, and commercial fishing vessels.
Core Technical Specifications TWIN DISC MG-5111 SC TRANSMISSION
- Horsepower Capacity:
- Pleasure Craft: Up to 800 hp @ 2300 rpm
- Intermediate Duty: Up to 480 hp @ 2100 rpm
- Continuous Commercial Duty: Up to 325-410 hp @ 1800 rpm
- Dry Weight: Approximately 555 lbs (252 kg)
- Housing Options: Available in SAE No. 1 or SAE No. 2 configurations.
- Available Gear Ratios: Identical forward and reverse reduction ratios including 1.12:1, 1.50:1, 1.74:1, 2.04:1, 2.54:1, and 3.10:1
Key Design Features Twin disc mg 5111 sc transmission price
- Identical Forward and Reverse Capacity: Allows full power to be transmitted in either direction, enabling identical right-hand rotation engines to drive both left and right-hand propellers.
- Helical Gearing: Carries a helical gear configuration for quieter, smoother operational performance.
- Hydraulic, Oil-Cooled Clutches: Features oil-controlled multi-disc clutches for smooth shifting under full load.
- In-Vessel Serviceability: Clutches can be fully serviced while the main transmission housing remains attached to the engine, saving significant dry-dock labor costs.
- Trolling Valve Optional: Twin disc mg 5111 sc transmission for sale Supports an optional mechanical or electronic trolling valve for precise, slow-speed maneuvering.






