Twin Disc Marine Transmissions & Spare Parts
Twin Disc Marine Transmissions & Spare Parts
Are you looking for genuine, high-quality spare parts for your Twin Disc marine propulsion systems? At Alfa Marine Spare Parts, we supply a comprehensive range of components for Twin Disc marine transmissions, clutches, and electronic controls to keep your vessel operating at peak performance.
Twin Disc does not build engines, but they manufacture the world’s most reliable gearboxes paired with major marine engines like Caterpillar, Cummins, Detroit Diesel, and MTU. When your propulsion system needs maintenance, downtime is not an option. We deliver the exact parts you need, worldwide.
Supported Twin Disc Equipment & Types
We supply parts for the entire portfolio of Twin Disc marine products, ranging from classic mechanical gearboxes to modern electronic propulsion systems.
1. Marine Transmissions (Gearboxes)
- Standard MG Series: Reliable helical gearing and hydraulic clutches for commercial and pleasure craft. We support popular models including MG-502, MG-5061, MG-5091, MG-5114, and MG-514M.
- QuickShift® MGX Series: Advanced propulsion units featuring patented clutch technology for ultra-smooth shifting and precise low-speed maneuvering. We supply parts for MGX-5114A, MGX-5147A, and MGX-5600.
- Hybrid Power Systems: Components for the MGH and MGE parallel hybrid transmission series.
2. Marine Clutches & Power Take-Offs (PTO)
- High-durability mechanical and pneumatic clutches for heavy-duty marine auxiliary equipment, pumps, and main propulsion disconnects.
3. Propulsion Systems & Controls
- Arneson® Surface Drives: Parts for high-performance surface-piercing propulsion systems.
- EC300 & EC600 Power Commander: Replacement electronic control units, lever heads, and wiring harnesses for bridge control systems.
Technical Information & Common Spare Parts
To ensure a perfect fit, Twin Disc systems require exact part matching based on the unit's Model Number, Specification Number, and Serial Number found on the metal data plate.
We stock and distribute a wide selection of critical service parts:
| Part Name / ComponentCommon Part Numbers (Examples)Application / System | ||
| Overhaul Seal & Gasket Kit | Kit No. 1017344 / 1021448 | MG-5114 / MG-514C |
| Clutch Plate (Friction) | Part No. 222384B / 203874 | MG-Series Hydraulic Clutch |
| Oil Pump Assembly | Part No. 1012398 / A6792C | Transmission Lubrication & Pressure |
| Rubber Block / Coupling | Part No. 408221 / 1008745 | Torsional Input Coupling |
| Solonoid Valve (12V/24V) | Part No. 1018339 / 1018340 | QuickShift® Electronic Profile Valve |
| Oil Cooler (Heat Exchanger) | Part No. 216334 / 218442 | Transmission Fluid Cooling |
Note: Part numbers vary greatly depending on your specific transmission specification. Always verify with our team before ordering.
Frequently Asked Questions (FAQ)
How do I find the correct part number for my Twin Disc gearbox?
You will need the data plate located on the housing of the transmission. It lists the Model (e.g., MG-514C), the Specification Number (e.g., BOM 38442), and the Serial Number. Provide these three details to our team, and we will locate the exact matching parts.
What is the difference between Twin Disc MG and MGX gearboxes?
The MG series uses traditional hydraulic actuation for dependable, standard shifting. The MGX series (QuickShift®) uses an advanced internal electronic clutch system that allows the transmission to shift instantly and smoothly, while also providing incredible control at extremely slow trolling speeds.
Do you ship Twin Disc spare parts globally?
Yes. Alfa Marine Spare Parts provides fast international shipping directly to docks, shipyards, and commercial vessels worldwide to minimize your vessel's downtime.
Can I replace an older mechanical Twin Disc control with an electronic one?
Yes. Twin Disc electronic control systems like the EC300 can often be retrofitted to older mechanical transmissions using electronic actuator kits. Contact us for technical feasibility.
Request a Quote for Twin Disc Parts
Minimize your vessel's downtime with rapid global logistics and expert technical support. Whether you need a simple gasket kit, replacement clutch plates, or a complete overhaul package, Alfa Marine Parts is your reliable maritime partner.
📩 Get a Technical Quote Today Request A Quote | Alfa Marine Spare Parts
Send your transmission model, specification number, and required parts list to info@alfamarinespareparts.com or fill out our online contact form. Our marine specialists will respond with pricing and availability within 24 hours.