FOR SALE Twin Disc MG-507A1 Marine Transmission 1.98:1 Ratio. Unit is complete, turns freely, and is ready for installation.
Twin Disc MG-507A1 marine transmission with 1.98:1 reduction and SAE #3 bellhousing, professionally removed as a low-hour RTO (Running Take-Out) from a properly maintained vessel.
This is a true commercial-duty marine transmission, widely used in sportfishing, commercial, patrol, and heavy cruising applications.
- Gear Ratio : 1.98:1
- SAE Housing : SAE #3
- Application : Heavy-Duty Marine Diesel Engines
- Type : Hydraulic Multi-Disc Marine Transmission
- Rotation : Standard RH Marine Configuration
- Cooling : Integrated Oil-to-Water Marine Cooler
- Max Input Speed : 3200 RPM
- Oil Capacity : Approx. 6.5 Liters (1.72 gal)
- Duty Rating : Up to ~400 HP (Intermittent), ~300 HP Continuous (Application Dependent)
FEATURES & SPECS
- Heavy-duty hydraulic marine transmission
- 1.98:1 reduction ratio
- SAE #3 bellhousing for Cummins, Volvo Penta, Caterpillar (require adapter plate with starter housing)
- Hydraulic multi-disc clutch packs
- Smooth forward & reverse engagement
- Pressure-lubricated system
- Integrated marine oil cooler
- Compatible with many Caterpillar, Cummins, Detroit Diesel, Volvo Penta, MAN & marine diesels














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