Description
Twin Disc MG-509 Marine Transmission
The Twin Disc MG-509 is a heavy-duty, hydraulically actuated marine transmission designed for commercial, industrial, and recreational vessels. Renowned for its durability and efficient power transfer, it is a staple in mid-sized workboats and fishing vessels.
Key Technical Specifications Twin Disc MG-509
- Power Capacity: Supports continuous duty up to 400 HP @ 1800 RPM and intermittent duty up to 500 HP @ 2300 RPM.
- Maximum Input Speed: 2500 to 3000 RPM.
- Dry Weight: Approximately 500–600 lbs (227-272 kg).
- Clutch Type: Hydraulically actuated, oil-cooled multi-disc clutch.
- Housing Compatibility: Fits SAE No. 1 or SAE No. 2 engine housings with 11.5″ or 14″ flywheels.
- Rotation: Supports both standard and reverse engine rotation
Common Reduction Ratios Twin disc mg 509 marine transmission price
The MG-509 accommodates various propulsion setups through multiple gear ratio options:
- 1.50:1
- 1.93:1
- 2.50:1
- 2.95:1
- 3.00:1
- 3.50:1
- 4.50:1 (Deep ratio version)
Optional Accessories & Features Twin disc mg 509 marine transmission for sale
- Live PTO (Power Take-Off): For driving auxiliary hydraulic pumps.
- Trolling Valve: Enables precise, ultra-low-speed control below normal idle speeds.
Maintenance Best Practices
- Oil Changes: Change transmission oil and replace the oil filter every 1,000 hours of operation.
- Cooling Check: Always verify the oil-to-water heat exchanger is clear of debris to prevent overheating.
- Shimming Specifications: When rebuilding or using an overhaul plate kit, bearing shimming must be verified via dial indicator to be within the factory range of 0.002 to 0.005 inches
